diff --git a/src/main.cpp b/src/main.cpp
index 4adbc26a5..bd15a6974 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -3412,6 +3412,8 @@ bool ProcessNewBlock(int32_t height,CValidationState &state, CNode* pfrom, CBloc
         bool fRequested = MarkBlockAsReceived(pblock->GetHash());
         fRequested |= fForceProcessing;
         if (!checked) {
+            if ( pfrom != 0 )
+                Misbehaving(pfrom->GetId(), 20);
             return error("%s: CheckBlock FAILED", __func__);
         }