diff --git a/qbsp/qbsp.h b/qbsp/qbsp.h
index 93102620..0ed0fd86 100644
--- a/qbsp/qbsp.h
+++ b/qbsp/qbsp.h
@@ -182,7 +182,7 @@ void StripExtension(char *path);
 void StripFilename(char *path);
 int IsAbsolutePath(const char *path);
 int Q_strcasecmp(const char *s1, const char *s2);
-
+int Q_strncasecmp(const char *s1, const char *s2, int n);
 char *copystring(const char *s);
 
 //===== mathlib.h