diff --git a/src/cryptonote_protocol/cryptonote_protocol_handler.inl b/src/cryptonote_protocol/cryptonote_protocol_handler.inl
index b38407840..03d04a074 100644
--- a/src/cryptonote_protocol/cryptonote_protocol_handler.inl
+++ b/src/cryptonote_protocol/cryptonote_protocol_handler.inl
@@ -341,6 +341,11 @@ namespace cryptonote
 
     if(m_core.have_block(hshd.top_id))
     {
+      if (target > hshd.current_height)
+      {
+        MINFO(context << "peer is not ahead of us and we're syncing, disconnecting");
+        return false;
+      }
       context.m_state = cryptonote_connection_context::state_normal;
       if(is_inital && target == m_core.get_current_blockchain_height())
         on_connection_synchronized();