diff --git a/mode/c.py b/mode/c.py
index 6c858af..10484ef 100644
--- a/mode/c.py
+++ b/mode/c.py
@@ -34,6 +34,7 @@ class CGrammar(Grammar):
         PatternRule(r'keyword', r"(?:auto|break|case|char|const|continue|default|double|do|else|enum|extern|float|for|goto|if|int|long|register|return|short|signed|sizeof|static|struct|switch|typedef|union|unsigned|void|volatile|while)(?![a-zA-Z_])"),
 
         PatternRule(r'builtin', r"(?:NULL|TRUE|FALSE)"),
+        PatternRule(r'label', r'[a-zA-Z_][a-zA-Z0-9_]*(?=:)'),
         PatternRule(r'identifier', r"[a-zA-Z_][a-zA-Z0-9_]*(?! *[\(:])"),
 
         RegionRule(r'macro', r'#(?:assert|cpu|define|elif|else|endif|error|ident|ifdef|ifndef|if|import|include_next|line|machine|pragma|pragma_once|system|unassert|undef|warning)(?!=[a-zA-Z0-9_])', MacroGrammar, r'\n$'),
@@ -50,7 +51,6 @@ class CGrammar(Grammar):
 
         RegionRule(r'macrocomment', r'#if +(?:0|NULL|FALSE)', Grammar, r'#endif'),
 
-        PatternRule(r'label', r'[a-zA-Z_][a-zA-Z0-9_]*(?=:)'),
         PatternRule(r'char', r"'.'|'\\.'|'\\[0-7]{3}'"),
         PatternRule(r'include', r'#include(?!=[a-zA-Z0-9_])'),
         PatternRule(r'header', r'<[-A-Za-z/0-9_\.]+>|"[-A-Za-z/0-9_\.]+"'),