diff --git a/src/main.cpp b/src/main.cpp
index 2e24eb950f7..21a352f7ba0 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -3639,6 +3639,11 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
 
             // Track requests for our stuff
             g_signals.Inventory(inv.hash);
+
+            if (pfrom->nSendSize > (SendBufferSize() * 2)) {
+                Misbehaving(pfrom->GetId(), 50);
+                return error("send buffer size() = %u", pfrom->nSendSize);
+            }
         }
     }