diff --git a/hosts/common/programs/zsh/default.nix b/hosts/common/programs/zsh/default.nix
index d691c0295..d98981413 100644
--- a/hosts/common/programs/zsh/default.nix
+++ b/hosts/common/programs/zsh/default.nix
@@ -168,7 +168,7 @@ in
           }
           function deref() {
             # convert a symlink into a plain file of the same content
-            if [ -L "$1" && -f "$1" ]; then
+            if [ -L "$1" ] && [ -f "$1" ]; then
               cp --dereference "$1" "$1.deref"
               mv -f "$1.deref" "$1"
             fi