diff --git a/tool/resources/org/antlr/v4/tool/templates/codegen/JavaScript/JavaScript.stg b/tool/resources/org/antlr/v4/tool/templates/codegen/JavaScript/JavaScript.stg
index a9cfef1c9..720516ebf 100644
--- a/tool/resources/org/antlr/v4/tool/templates/codegen/JavaScript/JavaScript.stg
+++ b/tool/resources/org/antlr/v4/tool/templates/codegen/JavaScript/JavaScript.stg
@@ -134,9 +134,9 @@ var decisionsToDFA = atn.decisionToState.map( function(ds, index) { return new a
 
 var sharedContextCache = new antlr4.PredictionContextCache();
 
-var literalNames = [ <parser.literalNames:{t | <t>}; null="'null'", separator=", ", wrap, anchor> ];
+var literalNames = [ <parser.literalNames:{t | <t>}; null="null", separator=", ", wrap, anchor> ];
 
-var symbolicNames = [ <parser.symbolicNames:{t | <t>}; null="'null'", separator=", ", wrap, anchor> ];
+var symbolicNames = [ <parser.symbolicNames:{t | <t>}; null="null", separator=", ", wrap, anchor> ];
 
 var ruleNames =  [ <parser.ruleNames:{r | "<r>"}; separator=", ", wrap, anchor> ];
 
@@ -825,9 +825,9 @@ function <lexer.name>(input) {
 
 <lexer.name>.modeNames = [ <lexer.modes:{m| "<m>"}; separator=", ", wrap, anchor> ];
 
-<lexer.name>.literalNames = [ <lexer.literalNames:{t | <t>}; null="'null'", separator=", ", wrap, anchor> ];
+<lexer.name>.literalNames = [ <lexer.literalNames:{t | <t>}; null="null", separator=", ", wrap, anchor> ];
 
-<lexer.name>.symbolicNames = [ <lexer.symbolicNames:{t | <t>}; null="'null'", separator=", ", wrap, anchor> ];
+<lexer.name>.symbolicNames = [ <lexer.symbolicNames:{t | <t>}; null="null", separator=", ", wrap, anchor> ];
 
 <lexer.name>.ruleNames = [ <lexer.ruleNames:{r | "<r>"}; separator=", ", wrap, anchor> ];