diff --git a/g10/gpg.c b/g10/gpg.c
index e228427d9..d193cb21d 100644
--- a/g10/gpg.c
+++ b/g10/gpg.c
@@ -73,6 +73,9 @@
 #define MY_O_BINARY  0
 #endif
 
+#ifdef __MINGW32__
+int _dowildcard = -1;
+#endif
 
 enum cmd_and_opt_values
   {