diff --git a/compat/mingw.h b/compat/mingw.h
index da9c53583a..1f9f35f63d 100644
--- a/compat/mingw.h
+++ b/compat/mingw.h
@@ -22,7 +22,7 @@ typedef int socklen_t;
 #define S_IWOTH 0
 #define S_IXOTH 0
 #define S_IRWXO (S_IROTH | S_IWOTH | S_IXOTH)
-#define S_ISUID 0
+#define S_ISUID 04000
 #define S_ISGID 0
 #define S_ISVTX 0