diff --git a/mmc/activation_mmc.cpp b/mmc/activation_mmc.cpp
index b5a5669..a50e99b 100644
--- a/mmc/activation_mmc.cpp
+++ b/mmc/activation_mmc.cpp
@@ -16,7 +16,7 @@
 void ActivationMMC::startActivation()
 {}
 
-void ActivationMMC::unitStateChange(sdbusplus::message::message&)
+void ActivationMMC::unitStateChange(sdbusplus::message_t&)
 {}
 
 void ActivationMMC::finishActivation()