diff --git a/grammars/javascript.cson b/grammars/javascript.cson
index 6ec36c23..b81267a7 100644
--- a/grammars/javascript.cson
+++ b/grammars/javascript.cson
@@ -1605,7 +1605,7 @@
         'name': 'storage.type.class.jsdoc'
       }
       {
-        'match': '({(?:\\*|(?:\\?|\\!|\\.{3})?[a-zA-Z_$][\\w$]*(?:\\.[a-zA-Z_$][\\w$]*)*)})\\s+(\\[(?:[a-zA-Z_$]+(?:=[\\w][\\s\\w$]*)?)\\]|(?:[a-zA-Z_$][\\w$]*(?:\\.[a-zA-Z_$][\\w$]*)*))\\s*((?:(?!\\*\\/).)*)'
+        'match': '({(?:\\*|(?:\\?|\\!|\\.{3})?[a-zA-Z_$][\\w$]*(?:\\.[a-zA-Z_$][\\w$]*)*=?)})\\s+(\\[(?:[a-zA-Z_$]+(?:=[\\w][\\s\\w$]*)?)\\]|(?:[a-zA-Z_$][\\w$]*(?:\\.[a-zA-Z_$][\\w$]*)*))\\s*((?:(?!\\*\\/).)*)'
         'captures':
             0:
               'name': 'other.meta.jsdoc'
diff --git a/spec/javascript-spec.coffee b/spec/javascript-spec.coffee
index a7d27a70..6edfde8f 100644
--- a/spec/javascript-spec.coffee
+++ b/spec/javascript-spec.coffee
@@ -1554,6 +1554,11 @@ describe "Javascript grammar", ->
       expect(tokens[6]).toEqual value: 'variable', scopes: ['source.js', 'comment.block.documentation.js', 'other.meta.jsdoc', 'variable.other.jsdoc']
       expect(tokens[8]).toEqual value: 'this is the description ', scopes: ['source.js', 'comment.block.documentation.js', 'other.meta.jsdoc', 'other.description.jsdoc']
 
+      {tokens} = grammar.tokenizeLine('/** @param {number=} variable this is the description */')
+      expect(tokens[4]).toEqual value: '{number=}', scopes: ['source.js', 'comment.block.documentation.js', 'other.meta.jsdoc', 'entity.name.type.instance.jsdoc']
+      expect(tokens[6]).toEqual value: 'variable', scopes: ['source.js', 'comment.block.documentation.js', 'other.meta.jsdoc', 'variable.other.jsdoc']
+      expect(tokens[8]).toEqual value: 'this is the description ', scopes: ['source.js', 'comment.block.documentation.js', 'other.meta.jsdoc', 'other.description.jsdoc']
+
     it "tokenizes // comments", ->
       {tokens} = grammar.tokenizeLine('// comment')
       expect(tokens[0]).toEqual value: '//', scopes: ['source.js', 'comment.line.double-slash.js', 'punctuation.definition.comment.js']