diff --git a/ethcore/src/builtin.rs b/ethcore/src/builtin.rs
index 0113e94f2..a2677abc7 100644
--- a/ethcore/src/builtin.rs
+++ b/ethcore/src/builtin.rs
@@ -410,14 +410,18 @@ mod bn128_gen {
 	lazy_static! {
 		pub static ref P2: G2 = G2::from(AffineG2::new(
 			Fq2::new(
-				Fq::from_str("10857046999023057135944570762232829481370756359578518086990519993285655852781").expect("1 is a valid field element"),
-				Fq::from_str("11559732032986387107991004021392285783925812861821192530917403151452391805634").expect("2 is a valid field element"),				
+				Fq::from_str("10857046999023057135944570762232829481370756359578518086990519993285655852781")
+					.expect("a valid field element"),
+				Fq::from_str("11559732032986387107991004021392285783925812861821192530917403151452391805634")
+					.expect("a valid field element"),
 			),
 			Fq2::new(
-				Fq::from_str("8495653923123431417604973247489272438418190587263600148770280649306958101930").expect("1 is a valid field element"),
-				Fq::from_str("4082367875863433681332203403145435568316851327593401208105741076214120093531").expect("2 is a valid field element"),				
+				Fq::from_str("8495653923123431417604973247489272438418190587263600148770280649306958101930")
+					.expect("a valid field element"),
+				Fq::from_str("4082367875863433681332203403145435568316851327593401208105741076214120093531")
+					.expect("a valid field element"),
 			),			
-		).expect("Generator P2(10857046999023057135944570762232829481370756359578518086990519993285655852781 + 11559732032986387107991004021392285783925812861821192530917403151452391805634i, 8495653923123431417604973247489272438418190587263600148770280649306958101930 + 4082367875863433681332203403145435568316851327593401208105741076214120093531i) is a valid curve point"));
+		).expect("the generator P2(10857046999023057135944570762232829481370756359578518086990519993285655852781 + 11559732032986387107991004021392285783925812861821192530917403151452391805634i, 8495653923123431417604973247489272438418190587263600148770280649306958101930 + 4082367875863433681332203403145435568316851327593401208105741076214120093531i) is a valid curve point"));
 	}	
 
 	lazy_static! {