diff --git a/nixos/modules/system/boot/kernel.nix b/nixos/modules/system/boot/kernel.nix
index 363d8e47a0f..1a6a9d99d5b 100644
--- a/nixos/modules/system/boot/kernel.nix
+++ b/nixos/modules/system/boot/kernel.nix
@@ -38,11 +38,11 @@ in
       default = pkgs.linuxPackages;
       type = types.unspecified // { merge = mergeEqualOption; };
       apply = kernelPackages: kernelPackages.extend (self: super: {
-        kernel = super.kernel.override {
+        kernel = super.kernel.override (originalArgs: {
           inherit randstructSeed;
-          kernelPatches = super.kernel.kernelPatches ++ kernelPatches;
+          kernelPatches = (originalArgs.kernelPatches or []) ++ kernelPatches;
           features = lib.recursiveUpdate super.kernel.features features;
-        };
+        });
       });
       # We don't want to evaluate all of linuxPackages for the manual
       # - some of it might not even evaluate correctly.
diff --git a/pkgs/os-specific/linux/kernel/linux-rt-5.10.nix b/pkgs/os-specific/linux/kernel/linux-rt-5.10.nix
index 78d1155e8ed..6ef781f6095 100644
--- a/pkgs/os-specific/linux/kernel/linux-rt-5.10.nix
+++ b/pkgs/os-specific/linux/kernel/linux-rt-5.10.nix
@@ -27,7 +27,7 @@ in buildLinux (args // {
       url = "mirror://kernel/linux/kernel/projects/rt/${branch}/older/patch-${version}.patch.xz";
       sha256 = "0szqm9f939p9z701i5hj881nf5bhfa0a6037bbcz974y0x8g9nmk";
     };
-  }; in [ rt-patch ] ++ lib.remove rt-patch kernelPatches;
+  }; in [ rt-patch ] ++ kernelPatches;
 
   structuredExtraConfig = with lib.kernel; {
     PREEMPT_RT = yes;
diff --git a/pkgs/os-specific/linux/kernel/linux-rt-5.11.nix b/pkgs/os-specific/linux/kernel/linux-rt-5.11.nix
index d9ebedf6801..5d1b14f1d0f 100644
--- a/pkgs/os-specific/linux/kernel/linux-rt-5.11.nix
+++ b/pkgs/os-specific/linux/kernel/linux-rt-5.11.nix
@@ -27,7 +27,7 @@ in buildLinux (args // {
       url = "mirror://kernel/linux/kernel/projects/rt/${branch}/older/patch-${version}.patch.xz";
       sha256 = "1az6cn9jj3bnjgwzzrjy1adnrnn06p2vzsnc1iib4xhs0sfr27hc";
     };
-  }; in [ rt-patch ] ++ lib.remove rt-patch kernelPatches;
+  }; in [ rt-patch ] ++ kernelPatches;
 
   structuredExtraConfig = with lib.kernel; {
     PREEMPT_RT = yes;
diff --git a/pkgs/os-specific/linux/kernel/linux-rt-5.4.nix b/pkgs/os-specific/linux/kernel/linux-rt-5.4.nix
index ec065e6833e..7be45dc3e68 100644
--- a/pkgs/os-specific/linux/kernel/linux-rt-5.4.nix
+++ b/pkgs/os-specific/linux/kernel/linux-rt-5.4.nix
@@ -23,7 +23,7 @@ in buildLinux (args // {
       url = "mirror://kernel/linux/kernel/projects/rt/${branch}/older/patch-${version}.patch.xz";
       sha256 = "0prfrvk2ds20sclikizzgg5qf4mfcyaymp9r272d5nj35293622n";
     };
-  }; in [ rt-patch ] ++ lib.remove rt-patch kernelPatches;
+  }; in [ rt-patch ] ++ kernelPatches;
 
   structuredExtraConfig = with lib.kernel; {
     PREEMPT_RT = yes;