diff --git a/lib/ace/mode/c_cpp_highlight_rules.js b/lib/ace/mode/c_cpp_highlight_rules.js
index e75b25db..8cb1dc7e 100644
--- a/lib/ace/mode/c_cpp_highlight_rules.js
+++ b/lib/ace/mode/c_cpp_highlight_rules.js
@@ -76,10 +76,10 @@ var c_cppHighlightRules = function() {
                 next : "qstring"
             }, {
                 token : "constant.numeric", // hex
-                regex : "0[xX][0-9a-fA-F]+\\b"
+                regex : "0[xX][0-9a-fA-F]+(L|l|UL|ul|u|U|F|f|ll|LL|ull|ULL)?\\b"
             }, {
                 token : "constant.numeric", // float
-                regex : "[+-]?\\d+(?:(?:\\.\\d*)?(?:[eE][+-]?\\d+)?)?\\b"
+                regex : "[+-]?\\d+(?:(?:\\.\\d*)?(?:[eE][+-]?\\d+)?)?(L|l|UL|ul|u|U|F|f|ll|LL|ull|ULL)?\\b"
             }, {
                 token : "keyword", // pre-compiler directives
                 regex : "(?:#include|#import|#pragma|#line|#define|#undef|#if|#ifdef|#else|#elif|#ifndef)\\b",