diff --git a/chain.go b/chain.go
index 9d4bb1f3..a587ac24 100644
--- a/chain.go
+++ b/chain.go
@@ -680,6 +680,15 @@ func (b *BlockChain) calcPastMedianTime(startNode *blockNode) (time.Time, error)
 	return medianTimestamp, nil
 }
 
+// CalcPastMedianTime calculates the median time of the previous few blocks
+// prior to, and including, the end of the current best chain.  It is primarily
+// used to ensure new blocks have sane timestamps.
+//
+// This function is NOT safe for concurrent access.
+func (b *BlockChain) CalcPastMedianTime() (time.Time, error) {
+	return b.calcPastMedianTime(b.bestChain)
+}
+
 // getReorganizeNodes finds the fork point between the main chain and the passed
 // node and returns a list of block nodes that would need to be detached from
 // the main chain and a list of block nodes that would need to be attached to