diff --git a/crypto/bn256/bn256_fast.go b/crypto/bn256/bn256_fast.go
index 5c081493b0..14b5965393 100644
--- a/crypto/bn256/bn256_fast.go
+++ b/crypto/bn256/bn256_fast.go
@@ -7,17 +7,19 @@
 // Package bn256 implements the Optimal Ate pairing over a 256-bit Barreto-Naehrig curve.
 package bn256
 
-import "github.com/ethereum/go-ethereum/crypto/bn256/cloudflare"
+import (
+	bn256cf "github.com/ethereum/go-ethereum/crypto/bn256/cloudflare"
+)
 
 // G1 is an abstract cyclic group. The zero value is suitable for use as the
 // output of an operation, but cannot be used as an input.
-type G1 = bn256.G1
+type G1 = bn256cf.G1
 
 // G2 is an abstract cyclic group. The zero value is suitable for use as the
 // output of an operation, but cannot be used as an input.
-type G2 = bn256.G2
+type G2 = bn256cf.G2
 
 // PairingCheck calculates the Optimal Ate pairing for a set of points.
 func PairingCheck(a []*G1, b []*G2) bool {
-	return bn256.PairingCheck(a, b)
+	return bn256cf.PairingCheck(a, b)
 }