diff --git a/interval_lib_wrapper/filib/CMakeLists.txt b/interval_lib_wrapper/filib/CMakeLists.txt
index e83ccc0fa..f61e90373 100644
--- a/interval_lib_wrapper/filib/CMakeLists.txt
+++ b/interval_lib_wrapper/filib/CMakeLists.txt
@@ -5,8 +5,8 @@ set (FILIB_NAME ${FILIB_NAME} PARENT_SCOPE)
 include (FindFilib.cmake)
 
 # Avoid overflowing display with warnings
-if (WIN32)
-	add_compile_options("/wd4244")
+if (MSVC) # [#573]
+	add_compile_options("/wd4244") # disable warning conversion from 'double' to '___', possible loss of data
 else ()
 	add_compile_options(-w)
 endif ()
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index f00dc50d8..170e28722 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -18,7 +18,7 @@ if (WIN32)
   target_compile_options (ibex PUBLIC "-U__STRICT_ANSI__")
 endif ()
 
-if (WIN32)
+if (MSVC)
 	target_compile_options (ibex PUBLIC "/wd4267" "/wd4244" "/wd4800" "/wd4018" "/wd4101" "/wd4715" "/wd4996" "/wd4065")
 else ()
 	target_compile_options (ibex PUBLIC "-Wno-unknown-pragmas" "-Wno-undefined-var-template") # last warning appears with Filib on MacOS