diff --git a/mmc/flash.cpp b/mmc/flash.cpp
index e1c5e9c..3bc2ab8 100644
--- a/mmc/flash.cpp
+++ b/mmc/flash.cpp
@@ -23,7 +23,7 @@
     bus.call_noreply(method);
 }
 
-void Activation::onStateChanges(sdbusplus::message::message& msg)
+void Activation::onStateChanges(sdbusplus::message_t& msg)
 {
     uint32_t newStateID{};
     sdbusplus::message::object_path newStateObjPath;