diff --git a/crypto/bn256/cloudflare/gfp6.go b/crypto/bn256/cloudflare/gfp6.go
index 83d61b781f..a42734911c 100644
--- a/crypto/bn256/cloudflare/gfp6.go
+++ b/crypto/bn256/cloudflare/gfp6.go
@@ -5,7 +5,7 @@ package bn256
 // http://eprint.iacr.org/2006/471.pdf.
 
 // gfP6 implements the field of size p⁶ as a cubic extension of gfP2 where τ³=ξ
-// and ξ=i+3.
+// and ξ=i+9.
 type gfP6 struct {
 	x, y, z gfP2 // value is xτ² + yτ + z
 }