diff --git a/src/privatesend-server.cpp b/src/privatesend-server.cpp
index f92340f68728a..cc328e54862a2 100644
--- a/src/privatesend-server.cpp
+++ b/src/privatesend-server.cpp
@@ -280,7 +280,7 @@ void CPrivateSendServer::SetNull()
 {
     // MN side
     vecSessionCollaterals.clear();
-    nSessionMaxParticipants = NULL;
+    nSessionMaxParticipants = 0;
 
     CPrivateSendBaseSession::SetNull();
     CPrivateSendBaseManager::SetNull();