diff --git a/pkgs/os-specific/linux/zfs/2_4.nix b/pkgs/os-specific/linux/zfs/2_4.nix
index 6f4cbc6861d4..7de7664f4dff 100644
--- a/pkgs/os-specific/linux/zfs/2_4.nix
+++ b/pkgs/os-specific/linux/zfs/2_4.nix
@@ -18,6 +18,15 @@ callPackage ./generic.nix args {
   # this package should point to the latest release.
   version = "2.4.3";
 
+  extraPatches = [
+    # https://github.com/openzfs/zfs/issues/18366
+    # dedup data corruption fix unreleased as of OpenZFS 2.4.3
+    (fetchpatch {
+      url = "https://github.com/openzfs/zfs/commit/6fb72fda0f60d9efb591e320f83f78b19ec451cc.patch?full_index=1";
+      hash = "sha256-UuSVmO61Ux5S3F+JAtRnHyeVS4EFobDTKBuD5s8PI+k=";
+    })
+  ];
+
   tests = {
     inherit (nixosTests.zfs) series_2_4;
   }