diff --git a/lenovo/thinkpad/t14/amd/gen5/default.nix b/lenovo/thinkpad/t14/amd/gen5/default.nix
index e61a3a0..917da63 100644
--- a/lenovo/thinkpad/t14/amd/gen5/default.nix
+++ b/lenovo/thinkpad/t14/amd/gen5/default.nix
@@ -6,6 +6,10 @@
     ../../../../../common/cpu/amd/pstate.nix
   ];
 
+  # Embedded controller wake-ups drain battery in s2idle on this device
+  # See https://lore.kernel.org/all/ZnFYpWHJ5Ml724Nv@ohnotp/
+  boot.kernelParams = [ "acpi.ec_no_wakeup=1" ];
+
   # For the Qualcomm NFA765 [17cb:1103] wireless network controller
   # See https://bugzilla.redhat.com/show_bug.cgi?id=2047878
   boot.kernelPackages = lib.mkIf (lib.versionOlder pkgs.linux.version "5.16") pkgs.linuxPackages_latest;