diff --git a/mrbgems/mruby-time/src/time.c b/mrbgems/mruby-time/src/time.c
index 0427fe3c0..b1abf21e6 100644
--- a/mrbgems/mruby-time/src/time.c
+++ b/mrbgems/mruby-time/src/time.c
@@ -10,6 +10,10 @@
 #include "mruby/class.h"
 #include "mruby/data.h"
 
+#if defined(__MINGW64__) || defined(__MINGW32__)
+# include <sys/time.h>
+#endif
+
 /** Time class configuration */
 
 /* gettimeofday(2) */