diff --git a/mmc/activation_mmc.cpp b/mmc/activation_mmc.cpp
index 84a1e98..b5a5669 100644
--- a/mmc/activation_mmc.cpp
+++ b/mmc/activation_mmc.cpp
@@ -16,7 +16,7 @@
 void ActivationMMC::startActivation()
 {}
 
-void ActivationMMC::unitStateChange(sdbusplus::message::message& msg)
+void ActivationMMC::unitStateChange(sdbusplus::message::message&)
 {}
 
 void ActivationMMC::finishActivation()