diff --git a/pkgs/kernel/default.nix b/pkgs/kernel/default.nix
index 647eb58a..879a785b 100644
--- a/pkgs/kernel/default.nix
+++ b/pkgs/kernel/default.nix
@@ -61,9 +61,8 @@ stdenv.mkDerivation rec {
   patches = [
     ./cmdline-cookie.patch
     ./mips-malta-fdt-from-bootloader.patch
-    ./phram-always-memremap.patch
-  ];# ++ lib.optional (lib.versionOlder version "5.18.0")
-    #./phram-allow-cached-mappings.patch
+  ] ++ lib.optional (lib.versionOlder version "5.18.0")
+    ./phram-allow-cached-mappings.patch;
 
   # this is here to work around what I think is a bug in nixpkgs
   # packaging of ncurses: it installs pkg-config data files which
diff --git a/pkgs/kernel/phram-always-memremap.patch b/pkgs/kernel/phram-always-memremap.patch
deleted file mode 100644
index 46b78e16..00000000
--- a/pkgs/kernel/phram-always-memremap.patch
+++ /dev/null
@@ -1,20 +0,0 @@
---- a/drivers/mtd/devices/phram.c	2024-12-20 23:42:19.248462526 +0100
-+++ b/drivers/mtd/devices/phram.c	2024-12-20 23:41:11.344218259 +0100
-@@ -85,7 +85,7 @@
- {
- 	void *addr = NULL;
- 
--	if (phram->cached)
-+	if (phram->cached || true)
- 		addr = memremap(start, len, MEMREMAP_WB);
- 	else
- 		addr = (void __force *)ioremap(start, len);
-@@ -101,7 +101,7 @@
- {
- 	void *addr = phram->mtd.priv;
- 
--	if (phram->cached) {
-+	if (phram->cached || true) {
- 		memunmap(addr);
- 		return;
- 	}