diff --git a/pkgs/servers/home-assistant/custom-components/solax_modbus/package.nix b/pkgs/servers/home-assistant/custom-components/solax_modbus/package.nix
index c44f1eb7d506..664d8c13f4ac 100644
--- a/pkgs/servers/home-assistant/custom-components/solax_modbus/package.nix
+++ b/pkgs/servers/home-assistant/custom-components/solax_modbus/package.nix
@@ -17,6 +17,12 @@ buildHomeAssistantComponent rec {
     hash = "sha256-fgvhF+1fz3pNOZJQjf/iF2Lh9j6mMkUXjgLyCja84K0=";
   };
 
+  postPatch = ''
+    substituteInPlace custom_components/solax_modbus/payload.py --replace-fail \
+      'from pymodbus.utilities import (' \
+      'from pymodbus.pdu.pdu import ('
+  '';
+
   dependencies = [ pymodbus ];
 
   meta = {