diff --git a/src/undo.c b/src/undo.c
index 4b1158a..c16bcac 100644
--- a/src/undo.c
+++ b/src/undo.c
@@ -316,7 +316,7 @@
     // Don't allow changes when 'modifiable' is off.
     if (!curbuf->b_p_ma)
     {
-	emsg(_(e_modifiable));
+	emsg(_(e_cannot_make_changes_modifiable_is_off));
 	return FALSE;
     }