diff --git a/Cargo.toml b/Cargo.toml
index c21b523..3b6b852 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,7 +4,7 @@ homepage = "http://ethcore.io"
 repository = "https://github.com/ethcore/parity"
 license = "GPL-3.0"
 name = "ethcore-bigint"
-version = "0.1.1"
+version = "0.1.2"
 authors = ["Ethcore <admin@ethcore.io>"]
 build = "build.rs"
 
diff --git a/src/hash.rs b/src/hash.rs
index f782d1f..20cdbae 100644
--- a/src/hash.rs
+++ b/src/hash.rs
@@ -386,6 +386,12 @@ macro_rules! impl_hash {
 				}
 			}
 		}
+
+		impl<'a> From<&'a [u8]> for $from {
+			fn from(s: &'a [u8]) -> $from {
+				$from::from_slice(s)
+			}
+		}
 	}
 }