diff --git a/contrib/tsearch2/query_gist.c b/contrib/tsearch2/query_gist.c
index aafb6901092..b49178aa835 100644
--- a/contrib/tsearch2/query_gist.c
+++ b/contrib/tsearch2/query_gist.c
@@ -231,8 +231,11 @@ gtsq_same(PG_FUNCTION_ARGS)
 {
 	TPQTGist   *a = (TPQTGist *) PG_GETARG_POINTER(0);
 	TPQTGist   *b = (TPQTGist *) PG_GETARG_POINTER(1);
+	bool	   *result = (bool *) PG_GETARG_POINTER(2);
 
-	PG_RETURN_POINTER(*a == *b);
+	*result = (*a == *b) ? true : false;
+
+	PG_RETURN_POINTER(result);
 }
 
 static int