diff --git a/programs/fish.nix b/programs/fish.nix
index f9e9262..12141aa 100644
--- a/programs/fish.nix
+++ b/programs/fish.nix
@@ -19,7 +19,7 @@ in {
       '';
 
       code = ''
-        if test -d "$argv[1]" or test -f "$argv[1]"
+        if test -d "$argv[1]" -o -f "$argv[1]"
             open -a "Visual Studio Code" "$argv[1]"
         else
             "/Applications/Visual Studio Code.app/Contents/Resources/app/bin/code" $argv