diff --git a/src/types/mod.rs b/src/types/mod.rs
index ace930fb..3b0e3d1c 100644
--- a/src/types/mod.rs
+++ b/src/types/mod.rs
@@ -63,7 +63,7 @@ macro_rules! from_map_impl {
 
 macro_rules! from_raw_from_impl {
     ($($expected:pat),+; $t:ty) => (
-        from_map_impl!($($expected),+; $t, |&mut: ty, mut buf: &[u8]| {
+        from_map_impl!($($expected),+; $t, |ty, mut buf: &[u8]| {
             use types::RawFromSql;
 
             RawFromSql::raw_from_sql(ty, &mut buf)