diff --git a/src/main.cpp b/src/main.cpp
index f0ecda976..a9c080ffa 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -3982,6 +3982,16 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
 
         CValidationState state;
         ProcessBlock(state, pfrom, &block);
+        int nDoS;
+        if (state.IsInvalid(nDoS)) {
+            pfrom->PushMessage("reject", strCommand, state.GetRejectCode(),
+                               state.GetRejectReason(), inv.hash);
+            if (nDoS > 0) {
+                LOCK(cs_main);
+                Misbehaving(pfrom->GetId(), nDoS);
+            }
+        }
+
     }