diff --git a/flake.nix b/flake.nix
index 7513dcd48..125992fa5 100644
--- a/flake.nix
+++ b/flake.nix
@@ -163,7 +163,9 @@
                 comment = meta.description;
                 desktopName = "TriliumNext Notes";
                 categories = [ "Office" ];
-                startupWMClass = "Trilium Notes Next";
+                # TODO: electron-forge build has this set to PRODUCT_NAME (forge.config.cjs)
+                # But the plain build doesn't set this (or the app icon).
+                startupWMClass = "TriliumNext Notes";
               })
             ];