diff --git a/pkgs/kde/plasma/kwin/default.nix b/pkgs/kde/plasma/kwin/default.nix
index 0d78ac721cf2..6b8bd06d5a0e 100644
--- a/pkgs/kde/plasma/kwin/default.nix
+++ b/pkgs/kde/plasma/kwin/default.nix
@@ -17,6 +17,7 @@
   pipewire,
   krunner,
   python3,
+  fetchpatch,
 }:
 mkKdeDerivation {
   pname = "kwin";
@@ -29,6 +30,13 @@ mkKdeDerivation {
     ./0003-plugins-qpa-allow-using-nixos-wrapper.patch
     ./0001-NixOS-Unwrap-executable-name-for-.desktop-search.patch
     ./0001-Lower-CAP_SYS_NICE-from-the-ambient-set.patch
+
+    # Backport crash fix
+    # FIXME: remove in 6.3.5
+    (fetchpatch {
+      url = "https://invent.kde.org/plasma/kwin/-/commit/93bf2f98ae22e654d997c7140b7fe9936fa3f2d3.patch";
+      hash = "sha256-Jaa7IVuYMfxzUv0y2rUo5hdYavjaUkEW9/yteL5katE=";
+    })
   ];
 
   postPatch = ''