diff --git a/src/avalanche/processor.cpp b/src/avalanche/processor.cpp
--- a/src/avalanche/processor.cpp
+++ b/src/avalanche/processor.cpp
@@ -9,6 +9,7 @@
 #include <avalanche/validation.h>
 #include <chain.h>
 #include <key_io.h> // For DecodeSecret
+#include <net.h>
 #include <netmessagemaker.h>
 #include <reverse_iterator.h>
 #include <scheduler.h>
diff --git a/src/netmessagemaker.h b/src/netmessagemaker.h
--- a/src/netmessagemaker.h
+++ b/src/netmessagemaker.h
@@ -6,9 +6,11 @@
 #ifndef BITCOIN_NETMESSAGEMAKER_H
 #define BITCOIN_NETMESSAGEMAKER_H
 
-#include <net.h>
 #include <serialize.h>
 
+struct CSerializedNetMsg;
+class CVectorWriter;
+
 class CNetMsgMaker {
 public:
     explicit CNetMsgMaker(int nVersionIn) : nVersion(nVersionIn) {}