diff --git a/compiler/lib/js_parser.mly b/compiler/lib/js_parser.mly
index 7bddaac0ff..90e11b8928 100644
--- a/compiler/lib/js_parser.mly
+++ b/compiler/lib/js_parser.mly
@@ -649,6 +649,20 @@ variable_with_loc:
           let name, _raw = i in
           var (p $symbolstartpos) name
         }
+  | ident_semi_keyword { var (p $symbolstartpos) (utf8_s (Js_token.to_string $1)) }
+
+(* add here keywords which are not considered reserved by ECMA *)
+ident_semi_keyword:
+ | T_OF { T_OF }
+ | T_TYPE { T_TYPE }
+ | T_DECLARE { T_DECLARE }
+ | T_PUBLIC { T_PUBLIC } | T_PRIVATE { T_PRIVATE } | T_PROTECTED { T_PROTECTED }
+ (* can have AS and ASYNC here but need to restrict arrow_function then *)
+ | T_ASYNC { T_ASYNC }
+ (* TODO: would like to add T_IMPORT here, but cause conflicts *)
+ | T_PACKAGE { T_PACKAGE }
+ | T_IMPLEMENTS { T_IMPLEMENTS }
+ | T_OPAQUE { T_OPAQUE }
 
 label:
   | T_IDENTIFIER {
diff --git a/compiler/tests-compiler/js_parser_printer.ml b/compiler/tests-compiler/js_parser_printer.ml
index f31e6f0b71..6c16b466ba 100644
--- a/compiler/tests-compiler/js_parser_printer.ml
+++ b/compiler/tests-compiler/js_parser_printer.ml
@@ -481,3 +481,21 @@ c
     11: 0:},
     12: 0://Provides: test(annot),
     13: 0:c (identifier), 0:; (virtual), |}]
+
+let%expect_test _ =
+  parse_print_token
+    ~extra:true
+    {|
+Event.prototype.initEvent = function _Event_initEvent(type, bubbles, cancelable) {
+    this.type = type
+    this.bubbles = bubbles
+    this.cancelable = cancelable
+}
+|};
+  [%expect
+    {|
+    2: 0:Event (identifier), 5:., 6:prototype (identifier), 15:., 16:initEvent (identifier), 26:=, 28:function, 37:_Event_initEvent (identifier), 53:(, 54:type, 58:,, 60:bubbles (identifier), 67:,, 69:cancelable (identifier), 79:), 81:{,
+    3: 4:this, 8:., 9:type, 14:=, 16:type, 0:; (virtual),
+    4: 4:this, 8:., 9:bubbles (identifier), 17:=, 19:bubbles (identifier), 0:; (virtual),
+    5: 4:this, 8:., 9:cancelable (identifier), 20:=, 22:cancelable (identifier), 0:; (virtual),
+    6: 0:}, 0:; (virtual), |}]