diff --git a/core/block_processor.go b/core/block_processor.go
index 97c8855361..0a98f3e32e 100644
--- a/core/block_processor.go
+++ b/core/block_processor.go
@@ -342,7 +342,7 @@ func (sm *BlockProcessor) VerifyUncles(statedb *state.StateDB, block, parent *ty
 			return UncleError(fmt.Sprintf("Uncle's parent unknown (%x)", uncle.ParentHash[0:4]))
 		}
 
-		if err := sm.ValidateHeader(uncle, ancestorHeaders[uncle.ParentHash]); err != nil && err != BlockEqualTSErr {
+		if err := sm.ValidateHeader(uncle, ancestorHeaders[uncle.ParentHash]); err != nil {
 			return ValidationError(fmt.Sprintf("%v", err))
 		}
 
diff --git a/core/chain_manager.go b/core/chain_manager.go
index d97a94b062..bf5ba9b405 100644
--- a/core/chain_manager.go
+++ b/core/chain_manager.go
@@ -448,7 +448,8 @@ func (self *ChainManager) InsertChain(chain types.Blocks) error {
 			}
 
 			if err == BlockEqualTSErr {
-				queue[i] = ChainSideEvent{block, logs}
+				//queue[i] = ChainSideEvent{block, logs}
+				// XXX silently discard it?
 				continue
 			}