diff --git a/pkgs/os-specific/linux/mxu11x0/default.nix b/pkgs/os-specific/linux/mxu11x0/default.nix
index d5129ca7f73a..ee29180a8d9d 100644
--- a/pkgs/os-specific/linux/mxu11x0/default.nix
+++ b/pkgs/os-specific/linux/mxu11x0/default.nix
@@ -1,13 +1,15 @@
 { lib, stdenv, fetchurl, kernel }:
 
-stdenv.mkDerivation {
+let
+  srcs = import (./srcs.nix) { inherit fetchurl; };
+in
+stdenv.mkDerivation rec {
   pname = "mxu11x0";
-  version = "1.4-${kernel.version}";
 
-  src = fetchurl {
-    url = "https://www.moxa.com/Moxa/media/PDIM/S100000385/moxa-uport-1000-series-linux-3.x-and-4.x-for-uport-11x0-series-driver-v1.4.tgz";
-    sha256 = "1hz9ygabbp8pv49k1j4qcsr0v3zw9xy0bh1akqgxp5v29gbdgxjl";
-  };
+  src = if lib.versionAtLeast kernel.version "5.0" then srcs.mxu11x0_5.src else srcs.mxu11x0_4.src;
+  mxu_version = if lib.versionAtLeast kernel.version "5.0" then srcs.mxu11x0_5.version else srcs.mxu11x0_4.version;
+
+  version = mxu_version + "-${kernel.version}";
 
   preBuild = ''
     sed -i -e "s/\$(uname -r).*/${kernel.modDirVersion}/g" driver/mxconf
@@ -33,6 +35,8 @@ stdenv.mkDerivation {
     license = licenses.gpl2Plus;
     maintainers = with maintainers; [ uralbash ];
     platforms = platforms.linux;
-    broken = kernel.kernelAtLeast "5.4";
+    # broken due to API change in write_room() > v5.14-rc1
+    # https://github.com/torvalds/linux/commit/94cc7aeaf6c0cff0b8aeb7cb3579cee46b923560
+    broken = kernel.kernelAtLeast "5.14";
   };
 }
diff --git a/pkgs/os-specific/linux/mxu11x0/srcs.nix b/pkgs/os-specific/linux/mxu11x0/srcs.nix
new file mode 100644
index 000000000000..5c4e9137c6a6
--- /dev/null
+++ b/pkgs/os-specific/linux/mxu11x0/srcs.nix
@@ -0,0 +1,18 @@
+{ fetchurl }:
+
+{
+  mxu11x0_4 = {
+    version = "4.1";
+    src = fetchurl {
+      url = "https://www.moxa.com/getmedia/b152d8c2-b9d6-4bc7-b0f4-420633b4bc2d/moxa-uport-1100-series-linux-kernel-4.x-driver-v4.1.tgz";
+      sha256 = "sha256-sbq5M5FQjrrORtSS07PQHf+MAZArxFcUDN5wszBwbnc=";
+    };
+  };
+  mxu11x0_5 = {
+    version = "5.1";
+    src = fetchurl {
+      url = "https://www.moxa.com/getmedia/57dfa4c1-8a2a-4da6-84c1-a36944ead74d/moxa-uport-1100-series-linux-kernel-5.x-driver-v5.1.tgz";
+      sha256 = "sha256-pdFIiD5naSDdYwRz8ww8Mg8z1gDOfZ/OeO6Q5n+kjDQ=";
+    };
+  };
+}