diff --git a/spec/app/text-mate-scope-selector-spec.coffee b/spec/app/text-mate-scope-selector-spec.coffee
index 8e6e071b5..392c22b77 100644
--- a/spec/app/text-mate-scope-selector-spec.coffee
+++ b/spec/app/text-mate-scope-selector-spec.coffee
@@ -21,6 +21,9 @@ describe "TextMateScopeSelector", ->
       expect(new TextMateScopeSelector('a_b_c').matches(['a_b_c'])).toBeTruthy()
       expect(new TextMateScopeSelector('a_b_c').matches(['a_b'])).toBeFalsy()
 
+    it "matches filters", ->
+      expect(new TextMateScopeSelector('R:g').matches(['g'])).toBeTruthy()
+
     it "matches disjunction", ->
       expect(new TextMateScopeSelector('a | b').matches(['b'])).toBeTruthy()
       expect(new TextMateScopeSelector('a|b|c').matches(['c'])).toBeTruthy()
diff --git a/src/app/text-mate-scope-selector-pattern.pegjs b/src/app/text-mate-scope-selector-pattern.pegjs
index 108b0cd2b..43d434644 100644
--- a/src/app/text-mate-scope-selector-pattern.pegjs
+++ b/src/app/text-mate-scope-selector-pattern.pegjs
@@ -30,8 +30,21 @@ group
     return selector;
   }
 
+filter
+  = prefix:([LRB]":") _ group:group {
+    return group;
+  }
+
+  / prefix:([LRB]":") _ path:path {
+    return path;
+  }
+
 expression
-  = "-" _ group:group _ {
+  = "-" _ filter:filter _ {
+    return new matchers.NegateMatcher(filter);
+  }
+
+  / "-" _ group:group _ {
     return new matchers.NegateMatcher(group);
   }
 
@@ -39,6 +52,8 @@ expression
     return new matchers.NegateMatcher(path);
   }
 
+  / filter
+
   / group
 
   / path