diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index c85b66602ee1baa8f01ea9314a39b04b62d0e6f8..ae203558ac9022f5a442b11cf0bbeab4dc93a86b 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -8970,6 +8970,7 @@ static void thinkpad_acpi_module_exit(void)
 	kfree(thinkpad_id.bios_version_str);
 	kfree(thinkpad_id.ec_version_str);
 	kfree(thinkpad_id.model_str);
+	kfree(thinkpad_id.nummodel_str);
 }