diff --git a/pkgs/data/themes/kwin-decorations/kde-rounded-corners/default.nix b/pkgs/data/themes/kwin-decorations/kde-rounded-corners/default.nix
index d808ae3690a8..f90fa9a68697 100644
--- a/pkgs/data/themes/kwin-decorations/kde-rounded-corners/default.nix
+++ b/pkgs/data/themes/kwin-decorations/kde-rounded-corners/default.nix
@@ -1,6 +1,7 @@
 {
   stdenv,
   fetchFromGitHub,
+  fetchpatch2,
   cmake,
   extra-cmake-modules,
   wrapQtAppsHook,
@@ -23,6 +24,13 @@ stdenv.mkDerivation rec {
     hash = "sha256-ef63PVG0JOHY4zyq5M5oAAcxtfhm1XOvpsxgSeXvgDo=";
   };
 
+  patches = [
+    (fetchpatch2 {
+      url = "https://github.com/matinlotfali/KDE-Rounded-Corners/commit/5d63212e65ed06ca65a2a7f0ad2436045b839ddd.patch";
+      hash = "sha256-wfjxMKRmJu3gflldNvWLghw5oFyyxY2ml1lsl/TVzxI=";
+    })
+  ];
+
   nativeBuildInputs = [
     cmake
     extra-cmake-modules