diff --git a/parser/src/main/java/dev/cel/parser/gen/CEL.g4 b/parser/src/main/java/dev/cel/parser/gen/CEL.g4
index 65f4b830d..5f0748fb6 100644
--- a/parser/src/main/java/dev/cel/parser/gen/CEL.g4
+++ b/parser/src/main/java/dev/cel/parser/gen/CEL.g4
@@ -45,9 +45,9 @@ calc
     ;
 
 unary
-    : member                                                        # MemberExpr
-    | (ops+='!')+ member                                            # LogicalNot
-    | (ops+='-')+ member                                            # Negate
+    : member
+    | op='!' unary
+    | op='-' unary
     ;
 
 member