diff --git a/nixos/modules/programs/fish.nix b/nixos/modules/programs/fish.nix
index c3f742acde2..5948fe11f92 100644
--- a/nixos/modules/programs/fish.nix
+++ b/nixos/modules/programs/fish.nix
@@ -9,7 +9,7 @@ let
   cfg = config.programs.fish;
 
   fishAliases = concatStringsSep "\n" (
-    mapAttrsFlatten (k: v: "alias ${k} '${v}'") cfg.shellAliases
+    mapAttrsFlatten (k: v: "alias ${k} ${escapeShellArg v}") cfg.shellAliases
   );
 
 in