diff --git a/grammar/src/types.grm b/grammar/src/types.grm
index ae299a85c24..aeb5e0f9884 100644
--- a/grammar/src/types.grm
+++ b/grammar/src/types.grm
@@ -42,5 +42,5 @@ projection
   ;
 
 functionType
-  : (type ".")? "(" parameter{","}? ")" "->" type?
+  : (type ".")? "(" parameter{","}? ")" "->" type
   ;