diff --git a/grammars/c.cson b/grammars/c.cson
index 8ce070f..0f2a895 100644
--- a/grammars/c.cson
+++ b/grammars/c.cson
@@ -213,6 +213,11 @@
     'match': '\\b([A-Za-z0-9_]+_t)\\b'
     'name': 'support.type.posix-reserved.c'
   }
+  {
+    'comment': 'Reserved for a good pratice types'
+    'match': '\\b([A-Za-z0-9_]+_[aefpsu])\\b'
+    'name': 'support.type.good-practice-reserved.c'
+  }
   {
     'include': '#block'
   }
diff --git a/spec/c-spec.coffee b/spec/c-spec.coffee
index 4ccd8e6..33ad9ba 100644
--- a/spec/c-spec.coffee
+++ b/spec/c-spec.coffee
@@ -50,6 +50,9 @@ describe "Language-C", ->
       {tokens} = grammar.tokenizeLine 'myType_t var;'
       expect(tokens[0]).toEqual value: 'myType_t', scopes: ['source.c', 'support.type.posix-reserved.c']
 
+      {tokens} = grammar.tokenizeLine 'myTypeGoodPractice_t var;'
+      expect(tokens[0]).toEqual value: 'myTypeGoodPractice_t', scopes: ['source.c', 'support.type.good-practice-reserved.c']
+
     it "tokenizes 'line continuation' character", ->
       {tokens} = grammar.tokenizeLine 'ma' + '\\' + '\n' + 'in(){};'
       expect(tokens[0]).toEqual value: 'ma', scopes: ['source.c']