diff --git a/ch04.asciidoc b/ch04.asciidoc
index 77e35207..e2301e88 100644
--- a/ch04.asciidoc
+++ b/ch04.asciidoc
@@ -100,7 +100,7 @@ $ sx newkey
 
 ((("elliptic curve cryptography", id="ix_ch04-asciidoc4", range="startofrange")))((("public key cryptography","elliptic curve cryptography", id="ix_ch04-asciidoc5", range="startofrange")))((("ECC", see="elliptic curve cryptography")))Elliptic curve cryptography is a type of asymmetric or public-key cryptography based on the discrete logarithm problem as expressed by addition and multiplication on the points of an elliptic curve. 
 
-<<ecc-curve>> shows we see an example of an elliptic curve, similar to that used by bitcoin.
+<<ecc-curve>> is an example of an elliptic curve, similar to that used by bitcoin.
 
 [[ecc-curve]]
 .An elliptic curve