diff --git a/CMakeLists.txt b/CMakeLists.txt
index b23d067ee..a54c45f76 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -30,6 +30,8 @@ if (NOT SNMALLOC_HEADER_ONLY_LIBRARY)
     set(SNMALLOC_CLEANUP_DEFAULT THREAD_CLEANUP)
   elseif (UNIX AND NOT APPLE)
     set(SNMALLOC_CLEANUP_DEFAULT PTHREAD_DESTRUCTORS)
+  elseif(MINGW)
+    set(SNMALLOC_CLEANUP_DEFAULT PTHREAD_DESTRUCTORS)
   else ()
     set(SNMALLOC_CLEANUP_DEFAULT CXX11_DESTRUCTORS)
   endif()
@@ -186,6 +188,10 @@ if (WIN32)
   message(STATUS "snmalloc: Avoiding Windows 10 APIs is ${WIN8COMPAT}")
 endif()
 
+if (MINGW)
+    target_link_libraries(snmalloc INTERFACE -lbcrypt)
+endif()
+
 # Detect support for cmpxchg16b; Werror is needed to make sure mcx16 must be used by targets
 check_cxx_compiler_flag("-Werror -Wextra -Wall -mcx16" SNMALLOC_COMPILER_SUPPORT_MCX16)
 if(SNMALLOC_COMPILER_SUPPORT_MCX16)
@@ -227,7 +233,8 @@ if(MSVC)
   target_compile_definitions(snmalloc INTERFACE -D_HAS_EXCEPTIONS=0)
 else()
   # All symbols are always dynamic on haiku and -rdynamic is redundant (and unsupported).
-  if (NOT CMAKE_SYSTEM_NAME STREQUAL "Haiku")
+  # MinGW does not recognize rdynamic either.
+  if (NOT CMAKE_SYSTEM_NAME STREQUAL "Haiku" AND NOT MINGW)
     # Get better stack traces in CI and debug builds.
     target_link_options(snmalloc INTERFACE $<${ci_or_debug}:-rdynamic>)
   endif()
diff --git a/src/override/memcpy.cc b/src/override/memcpy.cc
index 6c858f422..ad72ebf41 100644
--- a/src/override/memcpy.cc
+++ b/src/override/memcpy.cc
@@ -15,7 +15,7 @@ using namespace snmalloc;
 #  define snprintf_l(buf, size, loc, msg, ...) \
     snprintf(buf, size, msg, __VA_ARGS__)
 // Windows has it with an underscore prefix
-#elif defined(_MSC_VER)
+#elif defined(_MSC_VER) || defined(__MINGW32__)
 #  define snprintf_l(buf, size, loc, msg, ...) \
     _snprintf_s_l(buf, size, _TRUNCATE, msg, loc, __VA_ARGS__)
 #endif
diff --git a/src/pal/pal_windows.h b/src/pal/pal_windows.h
index 1667dce9f..b5ac5d74c 100644
--- a/src/pal/pal_windows.h
+++ b/src/pal/pal_windows.h
@@ -13,7 +13,9 @@
 #    define NOMINMAX
 #  endif
 #  include <windows.h>
-#  pragma comment(lib, "bcrypt.lib")
+#  ifndef __MINGW32__
+#    pragma comment(lib, "bcrypt.lib")
+#  endif
 #  include <bcrypt.h>
 // VirtualAlloc2 is exposed in RS5 headers.
 #  ifdef NTDDI_WIN10_RS5
diff --git a/src/test/func/malloc/malloc.cc b/src/test/func/malloc/malloc.cc
index a672a25a1..a649815a8 100644
--- a/src/test/func/malloc/malloc.cc
+++ b/src/test/func/malloc/malloc.cc
@@ -1,4 +1,6 @@
-#include <stdio.h>
+#include <iomanip>
+#include <ios>
+#include <iostream>
 #include <test/setup.h>
 
 #define SNMALLOC_NAME_MANGLE(a) our_##a
@@ -15,7 +17,7 @@ void check_result(size_t size, size_t align, void* p, int err, bool null)
   bool failed = false;
   if (errno != err && err != SUCCESS)
   {
-    printf("Expected error: %d but got %d\n", err, errno);
+    std::cout << "Expected error: " << err << " but got " << errno << std::endl;
     failed = true;
   }
 
@@ -23,7 +25,7 @@ void check_result(size_t size, size_t align, void* p, int err, bool null)
   {
     if (p != nullptr)
     {
-      printf("Expected null, and got non-null return!\n");
+      std::cout << "Expected null, and got non-null return!" << std::endl;
       abort();
     }
     return;
@@ -31,7 +33,7 @@ void check_result(size_t size, size_t align, void* p, int err, bool null)
 
   if ((p == nullptr) && (size != 0))
   {
-    printf("Unexpected null returned.\n");
+    std::cout << "Unexpected null returned." << std::endl;
     failed = true;
   }
   const auto alloc_size = our_malloc_usable_size(p);
@@ -46,44 +48,43 @@ void check_result(size_t size, size_t align, void* p, int err, bool null)
 #endif
   if (exact_size && (alloc_size != expected_size) && (size != 0))
   {
-    printf(
-      "Usable size is %zu, but required to be %zu.\n",
-      alloc_size,
-      expected_size);
+    std::cout << "Usable size is " << alloc_size << ", but required to be "
+              << expected_size << "." << std::endl;
     failed = true;
   }
   if ((!exact_size) && (alloc_size < expected_size))
   {
-    printf(
-      "Usable size is %zu, but required to be at least %zu.\n",
-      alloc_size,
-      expected_size);
+    std::cout << "Usable size is " << alloc_size
+              << ", but required to be at least " << expected_size << "."
+              << std::endl;
     failed = true;
   }
   if (
     (static_cast<size_t>(reinterpret_cast<uintptr_t>(p) % align) != 0) &&
     (size != 0))
   {
-    printf(
-      "Address is 0x%zx, but required to be aligned to 0x%zx.\n",
-      reinterpret_cast<size_t>(p),
-      align);
+    std::ios_base::fmtflags f(std::cout.flags());
+    std::cout << std::hex << "Address is " << p
+              << ", but required to be aligned to 0x" << align << "."
+              << std::endl;
+    std::cout.flags(f);
     failed = true;
   }
   if (
     static_cast<size_t>(
       reinterpret_cast<uintptr_t>(p) % natural_alignment(size)) != 0)
   {
-    printf(
-      "Address is 0x%zx, but should have natural alignment to 0x%zx.\n",
-      reinterpret_cast<size_t>(p),
-      natural_alignment(size));
+    std::ios_base::fmtflags f(std::cout.flags());
+    std::cout << std::hex << "Address is " << p
+              << ", but should have natural alignment to 0x"
+              << natural_alignment(size) << "." << std::endl;
+    std::cout.flags(f);
     failed = true;
   }
 
   if (failed)
   {
-    printf("check_result failed! %p", p);
+    std::cout << "check_result failed! " << p << std::endl;
     abort();
   }
   our_free(p);
@@ -91,7 +92,8 @@ void check_result(size_t size, size_t align, void* p, int err, bool null)
 
 void test_calloc(size_t nmemb, size_t size, int err, bool null)
 {
-  printf("calloc(%zu, %zu)  combined size %zu\n", nmemb, size, nmemb * size);
+  std::cout << "calloc(" << nmemb << ", " << size << ")"
+            << " combined size " << nmemb * size << std::endl;
   errno = SUCCESS;
   void* p = our_calloc(nmemb, size);
 
@@ -101,7 +103,7 @@ void test_calloc(size_t nmemb, size_t size, int err, bool null)
     {
       if (((uint8_t*)p)[i] != 0)
       {
-        printf("non-zero at @%zu\n", i);
+        std::cout << "non-zero at @" << i << std::endl;
         abort();
       }
     }
@@ -115,7 +117,8 @@ void test_realloc(void* p, size_t size, int err, bool null)
   if (p != nullptr)
     old_size = our_malloc_usable_size(p);
 
-  printf("realloc(%p(%zu), %zu)\n", p, old_size, size);
+  std::cout << "realloc(" << p << "(" << old_size << ")"
+            << ", " << size << ")" << std::endl;
   errno = SUCCESS;
   auto new_p = our_realloc(p, size);
   // Realloc failure case, deallocate original block
@@ -126,7 +129,8 @@ void test_realloc(void* p, size_t size, int err, bool null)
 
 void test_posix_memalign(size_t size, size_t align, int err, bool null)
 {
-  printf("posix_memalign(&p, %zu, %zu)\n", align, size);
+  std::cout << "posix_memalign(&p, " << align << ", " << size << ")"
+            << std::endl;
   void* p = nullptr;
   errno = our_posix_memalign(&p, align, size);
   check_result(size, align, p, err, null);
@@ -134,7 +138,7 @@ void test_posix_memalign(size_t size, size_t align, int err, bool null)
 
 void test_memalign(size_t size, size_t align, int err, bool null)
 {
-  printf("memalign(%zu, %zu)\n", align, size);
+  std::cout << "memalign(" << align << ", " << size << ")" << std::endl;
   errno = SUCCESS;
   void* p = our_memalign(align, size);
   check_result(size, align, p, err, null);
@@ -147,7 +151,8 @@ void test_reallocarray(void* p, size_t nmemb, size_t size, int err, bool null)
   if (p != nullptr)
     old_size = our_malloc_usable_size(p);
 
-  printf("reallocarray(%p(%zu), %zu)\n", p, old_size, tsize);
+  std::cout << "reallocarray(" << p << "(" << old_size << ")"
+            << ", " << tsize << ")" << std::endl;
   errno = SUCCESS;
   auto new_p = our_reallocarray(p, nmemb, size);
   if (new_p == nullptr && tsize != 0)
@@ -166,11 +171,13 @@ void test_reallocarr(
   int r = our_reallocarr(&p, nmemb, size);
   if (r != err)
   {
-    printf("reallocarr failed! expected %d got %d\n", err, r);
+    std::cout << "reallocarr failed! expected " << err << " got " << r
+              << std::endl;
     abort();
   }
 
-  printf("reallocarr(%p(%zu), %zu)\n", p, nmemb, size);
+  std::cout << "reallocarr(" << p << "(" << nmemb << ")"
+            << ", " << size << ")" << std::endl;
   check_result(nmemb * size, 1, p, err, null);
   p = our_malloc(size);
   if (!p)
@@ -187,7 +194,7 @@ void test_reallocarr(
   {
     if (static_cast<char*>(p)[i] != 1)
     {
-      printf("data consistency failed! at %zu", i);
+      std::cout << "data consistency failed! at " << i << std::endl;
       abort();
     }
   }
@@ -206,7 +213,7 @@ int main(int argc, char** argv)
   for (smallsizeclass_t sc = 0; sc < (MAX_SMALL_SIZECLASS_BITS + 4); sc++)
   {
     const size_t size = bits::one_at_bit(sc);
-    printf("malloc: %zu\n", size);
+    std::cout << "malloc: " << size << std::endl;
     errno = SUCCESS;
     check_result(size, 1, our_malloc(size), SUCCESS, false);
     errno = SUCCESS;
@@ -258,7 +265,7 @@ int main(int argc, char** argv)
     for (smallsizeclass_t sc2 = 0; sc2 < (MAX_SMALL_SIZECLASS_BITS + 4); sc2++)
     {
       const size_t size2 = bits::one_at_bit(sc2);
-      printf("size1: %zu, size2:%zu\n", size, size2);
+      std::cout << "size1: " << size << ", size2: " << size2 << std::endl;
       test_realloc(our_malloc(size), size2, SUCCESS, false);
       test_realloc(our_malloc(size + 1), size2, SUCCESS, false);
     }
@@ -313,13 +320,13 @@ int main(int argc, char** argv)
     void* p = our_malloc(size);
     if (p == nullptr)
     {
-      printf("realloc alloc failed with %zu\n", size);
+      std::cout << "realloc alloc failed with " << size << std::endl;
       abort();
     }
     int r = our_reallocarr(&p, 1, ((size_t)-1) / 2);
     if (r != ENOMEM)
     {
-      printf("expected failure on allocation\n");
+      std::cout << "expected failure on allocation" << std::endl;
       abort();
     }
     our_free(p);
@@ -327,14 +334,14 @@ int main(int argc, char** argv)
     for (smallsizeclass_t sc2 = 0; sc2 < (MAX_SMALL_SIZECLASS_BITS + 4); sc2++)
     {
       const size_t size2 = bits::one_at_bit(sc2);
-      printf("size1: %zu, size2:%zu\n", size, size2);
+      std::cout << "size1: " << size << ", size2: " << size2 << std::endl;
       test_reallocarr(size, 1, size2, SUCCESS, false);
     }
   }
 
   if (our_malloc_usable_size(nullptr) != 0)
   {
-    printf("malloc_usable_size(nullptr) should be zero");
+    std::cout << "malloc_usable_size(nullptr) should be zero" << std::endl;
     abort();
   }