diff --git a/pkgs/applications/window-managers/i3/wsr.nix b/pkgs/applications/window-managers/i3/wsr.nix
index 68ae959c2631..e64194ac3817 100644
--- a/pkgs/applications/window-managers/i3/wsr.nix
+++ b/pkgs/applications/window-managers/i3/wsr.nix
@@ -20,6 +20,7 @@ rustPlatform.buildRustPackage rec {
   doCheck = false;
 
   meta = with lib; {
+    mainProgram = "i3wsr";
     description = "Automatically change i3 workspace names based on their contents";
     longDescription = ''
       Automatically sets the workspace names to match the windows on the workspace.