diff --git a/pkgs/applications/networking/browsers/floorp/default.nix b/pkgs/applications/networking/browsers/floorp/default.nix
index bc8c6eabf896..ff36607709bc 100644
--- a/pkgs/applications/networking/browsers/floorp/default.nix
+++ b/pkgs/applications/networking/browsers/floorp/default.nix
@@ -31,6 +31,13 @@
     "--with-unsigned-addon-scopes=app,system"
   ];
 
+  extraPostPatch = ''
+    # Fix .desktop files for PWAs generated by Floorp; they hardcode /usr/bin
+    # https://github.com/NixOS/nixpkgs/issues/314115
+    substituteInPlace floorp/browser/base/content/modules/ssb/LinuxSupport.mjs \
+      --replace-fail /usr/bin/floorp floorp
+  '';
+
   updateScript = ./update.sh;
 
   meta = {