diff --git a/src/proto/if_python.pro b/src/proto/if_python.pro
index 4ba977c..8aa7674 100644
--- a/src/proto/if_python.pro
+++ b/src/proto/if_python.pro
@@ -3,6 +3,7 @@
 void python_end __ARGS((void));
 int python_loaded __ARGS((void));
 void ex_python __ARGS((exarg_T *eap));
+void ex_pydo __ARGS((exarg_T *eap));
 void ex_pyfile __ARGS((exarg_T *eap));
 void python_buffer_free __ARGS((buf_T *buf));
 void python_window_free __ARGS((win_T *win));