diff --git a/src/PowerMeterSerialSdm.cpp b/src/PowerMeterSerialSdm.cpp
index 40514427a..6c0ce82fc 100644
--- a/src/PowerMeterSerialSdm.cpp
+++ b/src/PowerMeterSerialSdm.cpp
@@ -2,7 +2,6 @@
 #include "PowerMeterSerialSdm.h"
 #include "PinMapping.h"
 #include "MessageOutput.h"
-#include "SerialPortManager.h"
 
 PowerMeterSerialSdm::~PowerMeterSerialSdm()
 {