diff --git a/ch07.asciidoc b/ch07.asciidoc
index 8690d188..3a288ebf 100644
--- a/ch07.asciidoc
+++ b/ch07.asciidoc
@@ -173,7 +173,7 @@ The process continues until there is only one node at the top, the node known as
 
 [[chain_of_blocks]]
 .Blocks linked in a chain, by reference to the previous block header hash
-image::images/msbt_0701.png[scale="50"]
+image::images/msbt_0701.png[]
 
 [[simple_merkle]]
 .Calculating the nodes in a merkle tree