diff --git a/src/libs/cplusplus/SimpleLexer.cpp b/src/libs/cplusplus/SimpleLexer.cpp
index f131c9de98e7032683a9398d390d6d52d624acde..93b93ec73cd85ca3d3f7b063436c6ef0a9b6912d 100644
--- a/src/libs/cplusplus/SimpleLexer.cpp
+++ b/src/libs/cplusplus/SimpleLexer.cpp
@@ -55,6 +55,11 @@ bool SimpleToken::isComment() const
     return _kind == T_COMMENT || _kind == T_DOXY_COMMENT;
 }
 
+bool SimpleToken::isObjCAtKeyword() const
+{
+    return _kind >= T_FIRST_LITERAL && _kind <= T_LAST_OBJC_AT_KEYWORD;
+}
+
 SimpleLexer::SimpleLexer()
     : _lastState(0),
       _skipComments(false),
diff --git a/src/libs/cplusplus/SimpleLexer.h b/src/libs/cplusplus/SimpleLexer.h
index 669b4c00453a8708bb22c12b489074190c2c22eb..872a236fd8999b33b3bac368bf25a8979853a33e 100644
--- a/src/libs/cplusplus/SimpleLexer.h
+++ b/src/libs/cplusplus/SimpleLexer.h
@@ -79,6 +79,7 @@ public:
     bool isOperator() const;
     bool isKeyword() const;
     bool isComment() const;
+    bool isObjCAtKeyword() const;
 
 public:
     int _kind;
diff --git a/src/plugins/cppeditor/cpphighlighter.cpp b/src/plugins/cppeditor/cpphighlighter.cpp
index 2f016c4d37d6f6c26d535e0c0f4b9cd5362875ff..20be805d54619fea21c8040eef58c34a3c8ba48c 100644
--- a/src/plugins/cppeditor/cpphighlighter.cpp
+++ b/src/plugins/cppeditor/cpphighlighter.cpp
@@ -157,7 +157,7 @@ void CppHighlighter::highlightBlock(const QString &text)
                 initialState = 0;
             }
 
-        } else if (tk.isKeyword() || isQtKeyword(tk.text()))
+        } else if (tk.isKeyword() || isQtKeyword(tk.text()) || tk.isObjCAtKeyword())
             setFormat(tk.position(), tk.length(), m_formats[CppKeywordFormat]);
 
         else if (tk.isOperator())
diff --git a/src/shared/cplusplus/Lexer.cpp b/src/shared/cplusplus/Lexer.cpp
index 2229b470bd225707b7c2d501a0f77479d531687b..5f727ef4afd360f38f5ec2061b3fe276f259496a 100644
--- a/src/shared/cplusplus/Lexer.cpp
+++ b/src/shared/cplusplus/Lexer.cpp
@@ -598,7 +598,7 @@ void Lexer::scan_helper(Token *tok)
 
                 do {
                     yyinp();
-                    if (! isalnum(_yychar))
+                    if (! (isalnum(_yychar) || _yychar == '_'))
                         break;
                 } while (_yychar);
 
diff --git a/src/shared/cplusplus/Token.cpp b/src/shared/cplusplus/Token.cpp
index bda5ecc5839d243c21c5cfb86f5486c20b2c3231..828da8da318b65a0ddaa86c71d39de49122bf067 100644
--- a/src/shared/cplusplus/Token.cpp
+++ b/src/shared/cplusplus/Token.cpp
@@ -56,7 +56,7 @@ static const char *token_names[] = {
 
     ("<comment>"), ("<doxy comment>"),
 
-    ("<identifier>"), ("<int literal>"), ("<float literal>"), ("<char literal>"),
+    ("<identifier>"), ("<numeric literal>"), ("<char literal>"),
     ("<wide char literal>"), ("<string literal>"), ("<wide char literal>"),
     ("<@string literal>"), ("<angle string literal>"),
 
diff --git a/src/shared/cplusplus/Token.h b/src/shared/cplusplus/Token.h
index 99b986c7abb49b1ecea7007e424efbce4b8b1c3a..6809468a1a6c39ede36d1ba366d5cb4e81b8ff28 100644
--- a/src/shared/cplusplus/Token.h
+++ b/src/shared/cplusplus/Token.h
@@ -224,9 +224,9 @@ enum Kind {
     T_AT_THROW,
     T_AT_TRY,
 
-    T_LAST_OBJC_AT_KEYWORD,
+    T_LAST_OBJC_AT_KEYWORD = T_AT_TRY,
 
-    T_FIRST_QT_KEYWORD = T_LAST_OBJC_AT_KEYWORD,
+    T_FIRST_QT_KEYWORD,
 
     // Qt keywords
     T_SIGNAL = T_FIRST_QT_KEYWORD,
@@ -300,7 +300,7 @@ public:
     { return kind == T_COMMENT || kind == T_DOXY_COMMENT; }
 
     inline bool isObjCAtKeyword() const
-    { return kind >= T_FIRST_OBJC_AT_KEYWORD && kind < T_LAST_OBJC_AT_KEYWORD; }
+    { return kind >= T_FIRST_OBJC_AT_KEYWORD && kind <= T_LAST_OBJC_AT_KEYWORD; }
 
     static const char *name(int kind);