diff --git a/ext/f2c_libs/dtime_.c b/ext/f2c_libs/dtime_.c
index 6a09b3e98..2335a27ae 100644
--- a/ext/f2c_libs/dtime_.c
+++ b/ext/f2c_libs/dtime_.c
@@ -1,5 +1,9 @@
 #include "time.h"
 
+#ifdef WIN32
+#pragma warning(disable:4244)
+#endif
+
 #ifdef MSDOS
 #undef USE_CLOCK
 #define USE_CLOCK
diff --git a/ext/f2c_libs/etime_.c b/ext/f2c_libs/etime_.c
index 2d9a36d8a..ba67ffde8 100644
--- a/ext/f2c_libs/etime_.c
+++ b/ext/f2c_libs/etime_.c
@@ -1,5 +1,9 @@
 #include "time.h"
 
+#ifdef WIN32
+#pragma warning(disable:4244)
+#endif
+
 #ifdef MSDOS
 #undef USE_CLOCK
 #define USE_CLOCK