--- a/squashfs-tools/action.c
+++ b/squashfs-tools/action.c
@@ -1905,6 +1905,9 @@
 	return 1;
 }
 
+#ifndef FNM_EXTMATCH
+#define FNM_EXTMATCH 0
+#endif
 
 TEST_FN(name, ACTION_ALL_LNK, \
 	return fnmatch(atom->argv[0], action_data->name,