1 files changed, 1 insertions, 1 deletions
diff --git a/src/nvim/undo.c b/src/nvim/undo.c
index 3999f475c6..ef1ac60599 100644
--- a/src/nvim/undo.c
+++ b/src/nvim/undo.c
@@ -677,7 +677,7 @@ char_u *u_get_undo_file_name(char_u *buf_ffname, int reading)
             if (vim_ispathsep(*p))
               *p = '%';
         }
-        undo_file_name = concat_fnames(dir_name, munged_name, TRUE);
+        undo_file_name = (char_u *)concat_fnames((char *)dir_name, (char *)munged_name, TRUE);
       }
     }