diff --git a/mrbgems/mruby-time/src/time.c b/mrbgems/mruby-time/src/time.c
index 1ffab9ae6..0427fe3c0 100644
--- a/mrbgems/mruby-time/src/time.c
+++ b/mrbgems/mruby-time/src/time.c
@@ -54,7 +54,7 @@
 
 typedef long suseconds_t;
 
-# ifndef __MINGW64__
+# if (!defined __MINGW64__) && (!defined __MINGW32__)
 struct timeval {
   time_t tv_sec;
   suseconds_t tv_usec;