diff --git a/home-manager.nix b/home-manager.nix
index c91a09d1..48a85899 100644
--- a/home-manager.nix
+++ b/home-manager.nix
@@ -5,7 +5,7 @@
     useGlobalPkgs = true;
     useUserPackages = true;
     extraSpecialArgs = { inherit inputs; };
-    backupFileExtension = "bak";
+    backupFileExtension = "hm-backup";
     users.functionalhacker =
       import ./users/functionalhacker/home.nix;
   };