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-rw-r--r--pygments/lexers/c_cpp.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/pygments/lexers/c_cpp.py b/pygments/lexers/c_cpp.py
index 35ea517f..624ebb71 100644
--- a/pygments/lexers/c_cpp.py
+++ b/pygments/lexers/c_cpp.py
@@ -181,7 +181,7 @@ class CLexer(CFamilyLexer):
def analyse_text(text):
if re.search('^\s*#include [<"]', text, re.MULTILINE):
return 0.1
- if re.search('^\s*#ifdef ', text, re.MULTILINE):
+ if re.search('^\s*#ifn?def ', text, re.MULTILINE):
return 0.1