1 files changed, 2 insertions, 0 deletions
diff --git a/src/c_subst.h b/src/c_subst.h
index 3f46893..3ca4d65 100644
--- a/src/c_subst.h
+++ b/src/c_subst.h
@@ -50,6 +50,8 @@
 
 #include "c_unixize.h"
 
+#define C_CHARSET_VALID "_."
+
 struct lfiles_s* c_subst_filenames(struct lfiles_s*,
 	const bool_t, const unsigned char);