diff --git a/home.nix b/home.nix
index 0e9fc1d..5455fdb 100644
--- a/home.nix
+++ b/home.nix
@@ -323,6 +323,9 @@ in {
         }
 
         WORDCHARS='*?[]~=&;!#$%^(){}<>'
+
+        # fixes duplication of commands when using tab-completion
+        export LANG=C.UTF-8
       '';
     };
   };