diff --git a/.gitignore b/.gitignore
index 62c8935..12278f3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,3 @@
-.idea/
\ No newline at end of file
+.idea/
+.cache/
+build/
\ No newline at end of file
diff --git a/src/pipe_lat.c b/src/pipe_lat.c
index cecf675..0e60060 100644
--- a/src/pipe_lat.c
+++ b/src/pipe_lat.c
@@ -127,7 +127,7 @@ int main(int argc, char *argv[]) {
       return 1;
     }
 
-    delta = ((stop.tv_sec - start.tv_sec) * 1000000000 +
+    delta = ((stop.tv_sec - start.tv_sec) * 1000000000LL +
              (stop.tv_nsec - start.tv_nsec));
 
 #else
@@ -136,8 +136,8 @@ int main(int argc, char *argv[]) {
       return 1;
     }
 
-    delta = (stop.tv_sec - start.tv_sec) * 1000000000 +
-            (stop.tv_usec - start.tv_usec) * 1000;
+    delta = (stop.tv_sec - start.tv_sec) * 1000000000LL +
+            (stop.tv_usec - start.tv_usec) * 1000LL;
 
 #endif
 
diff --git a/src/tcp_lat.c b/src/tcp_lat.c
index 9c9c99f..617ed88 100644
--- a/src/tcp_lat.c
+++ b/src/tcp_lat.c
@@ -187,7 +187,7 @@ int main(int argc, char *argv[]) {
       return 1;
     }
 
-    delta = ((stop.tv_sec - start.tv_sec) * 1000000000 +
+    delta = ((stop.tv_sec - start.tv_sec) * 1000000000LL +
              (stop.tv_nsec - start.tv_nsec));
 
 #else
@@ -196,8 +196,8 @@ int main(int argc, char *argv[]) {
       return 1;
     }
 
-    delta = (stop.tv_sec - start.tv_sec) * 1000000000 +
-            (stop.tv_usec - start.tv_usec) * 1000;
+    delta = (stop.tv_sec - start.tv_sec) * 1000000000LL +
+            (stop.tv_usec - start.tv_usec) * 1000LL;
 
 #endif
 
diff --git a/src/tcp_remote_lat.c b/src/tcp_remote_lat.c
index 3f4b6cd..2208959 100644
--- a/src/tcp_remote_lat.c
+++ b/src/tcp_remote_lat.c
@@ -121,8 +121,8 @@ int main(int argc, char *argv[]) {
 
   gettimeofday(&stop, NULL);
 
-  delta = (stop.tv_sec - start.tv_sec) * 1000000000 +
-          (stop.tv_usec - start.tv_usec) * 1000;
+  delta = (stop.tv_sec - start.tv_sec) * 1000000000LL +
+          (stop.tv_usec - start.tv_usec) * 1000LL;
 
   printf("average latency: %" PRId64 " ns\n", delta / (count * 2));
 
diff --git a/src/udp_lat.c b/src/udp_lat.c
index 0d73e56..530f6f2 100644
--- a/src/udp_lat.c
+++ b/src/udp_lat.c
@@ -186,7 +186,7 @@ int main(int argc, char *argv[]) {
       return 1;
     }
 
-    delta = ((stop.tv_sec - start.tv_sec) * 1000000000 +
+    delta = ((stop.tv_sec - start.tv_sec) * 1000000000LL +
              (stop.tv_nsec - start.tv_nsec));
 
 #else
@@ -195,8 +195,8 @@ int main(int argc, char *argv[]) {
       return 1;
     }
 
-    delta = (stop.tv_sec - start.tv_sec) * 1000000000 +
-            (stop.tv_usec - start.tv_usec) * 1000;
+    delta = (stop.tv_sec - start.tv_sec) * 1000000000LL +
+            (stop.tv_usec - start.tv_usec) * 1000LL;
 
 #endif
 
diff --git a/src/unix_lat.c b/src/unix_lat.c
index 312a313..eaa493c 100644
--- a/src/unix_lat.c
+++ b/src/unix_lat.c
@@ -120,7 +120,7 @@ int main(int argc, char *argv[]) {
       return 1;
     }
 
-    delta = ((stop.tv_sec - start.tv_sec) * 1000000000 +
+    delta = ((stop.tv_sec - start.tv_sec) * 1000000000LL +
              (stop.tv_nsec - start.tv_nsec));
 
 #else
@@ -129,8 +129,8 @@ int main(int argc, char *argv[]) {
       return 1;
     }
 
-    delta = (stop.tv_sec - start.tv_sec) * 1000000000 +
-            (stop.tv_usec - start.tv_usec) * 1000;
+    delta = (stop.tv_sec - start.tv_sec) * 1000000000LL +
+            (stop.tv_usec - start.tv_usec) * 1000LL;
 
 #endif