diff --git a/Parser/pgenmain.c b/Parser/pgenmain.c
index 9ed8cab8599..9441e587ed0 100644
--- a/Parser/pgenmain.c
+++ b/Parser/pgenmain.c
@@ -50,6 +50,7 @@ PERFORMANCE OF THIS SOFTWARE.
 #include "pgen.h"
 
 int Py_DebugFlag;
+int Py_VerboseFlag;
 
 /* Forward */
 grammar *getgrammar Py_PROTO((char *filename));