diff --git a/types/test_util.go b/types/test_util.go
index d226fd99..95404af1 100644
--- a/types/test_util.go
+++ b/types/test_util.go
@@ -62,7 +62,6 @@ func MakeBlock(height int64, txs []Tx, lastCommit *Commit, evidence []Evidence)
 	block := &Block{
 		Header: Header{
 			Height: height,
-			NumTxs: int64(len(txs)),
 		},
 		Data: Data{
 			Txs: txs,