diff --git a/src/net.cpp b/src/net.cpp
index 9cd2d30d9dd..18fe95e6755 100644
--- a/src/net.cpp
+++ b/src/net.cpp
@@ -498,7 +498,7 @@ void CNode::SetAddrLocal(const CService& addrLocalIn) {
 
 #undef X
 #define X(name) stats.name = name
-void CNode::copyStats(CNodeStats &stats, std::vector<bool> &m_asmap)
+void CNode::copyStats(CNodeStats &stats, const std::vector<bool> &m_asmap)
 {
     stats.nodeid = this->GetId();
     X(nServices);
diff --git a/src/net.h b/src/net.h
index 92f7799e977..819947658a6 100644
--- a/src/net.h
+++ b/src/net.h
@@ -983,7 +983,7 @@ public:
 
     void CloseSocketDisconnect();
 
-    void copyStats(CNodeStats &stats, std::vector<bool> &m_asmap);
+    void copyStats(CNodeStats &stats, const std::vector<bool> &m_asmap);
 
     ServiceFlags GetLocalServices() const
     {