diff --git a/include/compat/time.h b/include/compat/time.h
index 68b00a6..3ef3bad 100644
--- a/include/compat/time.h
+++ b/include/compat/time.h
@@ -13,3 +13,7 @@
 #else
 #include_next <time.h>
 #endif
+
+#ifdef _WIN32
+#define timegm(tm) _mkgmtime(tm)
+#endif