diff --git a/lib/linguist/heuristics.rb b/lib/linguist/heuristics.rb
index f4303c88..c7f31a42 100644
--- a/lib/linguist/heuristics.rb
+++ b/lib/linguist/heuristics.rb
@@ -39,8 +39,9 @@ module Linguist
       matches = []
       if (/@(interface|class|protocol|synchronised|selector|implementation)/.match(data))
         matches << Language["Objective-C"]
-      elsif (/^\s*#\s*include <(cstdint|string|vector|map|list|array|bitset|queue|stack|forward_list|unordered_map|unordered_set)>/.match(data) or
-          /template\s*</.match(data) or /[^@]class/.match(data))
+      end
+      if (/^\s*#\s*include <(cstdint|string|vector|map|list|array|bitset|queue|stack|forward_list|unordered_map|unordered_set)>/.match(data) or
+          /^\s*template\s*</.match(data) or /[^@]class\s+\w+/.match(data) or /^[^@](private|public|protected):$/.match(data))
         matches << Language["C++"]
       end
       matches