diff --git a/lv2lint.c b/lv2lint.c
index e18a574..29fcac1 100644
--- a/lv2lint.c
+++ b/lv2lint.c
@@ -668,6 +668,9 @@ _pattern_match(const char *pattern, const char *str)
 	}
 
 #if defined(HAS_FNMATCH)
+#	ifndef FNM_EXTMATCH /* glibc extension */
+#		define FNM_EXTMATCH 0
+#	endif
 	if(fnmatch(pattern, str, FNM_CASEFOLD | FNM_EXTMATCH) == 0)
 #else
 	if(strcasecmp(pattern, str) == 0)