diff --git a/misc/yap.def b/misc/yap.def
index 90fd3b73a..858060579 100644
--- a/misc/yap.def
+++ b/misc/yap.def
@@ -49,6 +49,7 @@ YAP_BufferToString
 YAP_BufferToAtomList
 YAP_Error
 YAP_RunGoal
+YAP_RunGoalOnce
 YAP_RestartGoal
 YAP_GoalHasException
 YAP_ClearExceptions