diff --git a/diesel/src/expression/mod.rs b/diesel/src/expression/mod.rs
index b2c026631be6..0f6fefc6f953 100644
--- a/diesel/src/expression/mod.rs
+++ b/diesel/src/expression/mod.rs
@@ -212,9 +212,9 @@ where
     T: Expression<SqlType = ST>,
     ST: SqlType + TypedExpressionType,
 {
-    type Expression = Self;
+    type Expression = T;
 
-    fn as_expression(self) -> Self {
+    fn as_expression(self) -> T {
         self
     }
 }
diff --git a/diesel/src/query_builder/mod.rs b/diesel/src/query_builder/mod.rs
index 7cbad028dff2..77be2dcba067 100644
--- a/diesel/src/query_builder/mod.rs
+++ b/diesel/src/query_builder/mod.rs
@@ -333,10 +333,10 @@ pub trait AsQuery {
 }
 
 impl<T: Query> AsQuery for T {
-    type SqlType = <Self as Query>::SqlType;
-    type Query = Self;
+    type SqlType = <T as Query>::SqlType;
+    type Query = T;
 
-    fn as_query(self) -> Self::Query {
+    fn as_query(self) -> <T as AsQuery>::Query {
         self
     }
 }
diff --git a/diesel/src/query_dsl/load_dsl.rs b/diesel/src/query_dsl/load_dsl.rs
index d03ffefe7575..843df18802ea 100644
--- a/diesel/src/query_dsl/load_dsl.rs
+++ b/diesel/src/query_dsl/load_dsl.rs
@@ -90,13 +90,15 @@ pub trait ExecuteDsl<Conn: Connection<Backend = DB>, DB: Backend = <Conn as Conn
     fn execute(query: Self, conn: &mut Conn) -> QueryResult<usize>;
 }
 
+use crate::result::Error;
+
 impl<Conn, DB, T> ExecuteDsl<Conn, DB> for T
 where
     Conn: Connection<Backend = DB>,
     DB: Backend,
     T: QueryFragment<DB> + QueryId,
 {
-    fn execute(query: Self, conn: &mut Conn) -> QueryResult<usize> {
+    fn execute(query: T, conn: &mut Conn) -> Result<usize, Error> {
         conn.execute_returning_count(&query)
     }
 }