diff --git a/src/proto/quickfix.pro b/src/proto/quickfix.pro
index adec72f..dbdca5f 100644
--- a/src/proto/quickfix.pro
+++ b/src/proto/quickfix.pro
@@ -13,7 +13,7 @@
 int bt_dontwrite __ARGS((buf_T *buf));
 int bt_dontwrite_msg __ARGS((buf_T *buf));
 int buf_hide __ARGS((buf_T *buf));
-int grep_internal __ARGS((exarg_T *eap));
+int grep_internal __ARGS((cmdidx_T cmdidx));
 void ex_make __ARGS((exarg_T *eap));
 void ex_cc __ARGS((exarg_T *eap));
 void ex_cnext __ARGS((exarg_T *eap));