diff --git a/pkgs/by-name/cp/cpu-x/package.nix b/pkgs/by-name/cp/cpu-x/package.nix
index f8ae9f30b695..0817e99d435e 100644
--- a/pkgs/by-name/cp/cpu-x/package.nix
+++ b/pkgs/by-name/cp/cpu-x/package.nix
@@ -32,11 +32,6 @@
   gtkmm3,
 }:
 
-# Known issues:
-# - The daemon can't be started from the GUI, because pkexec requires a shell
-#   registered in /etc/shells. The nix's bash is not in there when running
-#   cpu-x from nixpkgs.
-
 stdenv.mkDerivation (finalAttrs: {
   pname = "cpu-x";
   version = "5.4.0";
@@ -48,6 +43,13 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-db7NxoVZgnYb1MZKfiFINx00JqDnf/TvwumBp6qDooQ=";
   };
 
+  postPatch = ''
+    # https://github.com/TheTumultuousUnicornOfDarkness/CPU-X/pull/402
+    # FIXME: remove in the next version
+    substituteInPlace src/core/bandwidth/{OOC/utility,routines}-x86-64bit.asm \
+      --replace-fail "cpu	ia64" "cpu	default"
+  '';
+
   nativeBuildInputs = [
     cmake
     pkg-config