diff --git a/crypto/bn256/cloudflare/bn256.go b/crypto/bn256/cloudflare/bn256.go
index 0e451339fa..38822a76bf 100644
--- a/crypto/bn256/cloudflare/bn256.go
+++ b/crypto/bn256/cloudflare/bn256.go
@@ -388,6 +388,7 @@ func (e *GT) Marshal() []byte {
 
 	if e.p == nil {
 		e.p = &gfP12{}
+		e.p.SetOne()
 	}
 
 	ret := make([]byte, numBytes*12)