diff --git a/Modules/grpmodule.c b/Modules/grpmodule.c
index 2fcc5aa3156..23f28f5e917 100644
--- a/Modules/grpmodule.c
+++ b/Modules/grpmodule.c
@@ -36,6 +36,9 @@ PERFORMANCE OF THIS SOFTWARE.
 #include <sys/types.h>
 #include <grp.h>
 
+#define getintarg(v,a) PyArg_Parse((v),"i",(a))
+#define getstrarg(v,a) PyArg_Parse((v),"s",(a))
+
 static PyObject *mkgrent(p)
 	struct group *p;
 {