diff --git a/clippy_lints/src/mut_mut.rs b/clippy_lints/src/mut_mut.rs
index 129f022606ad..501959e0f623 100644
--- a/clippy_lints/src/mut_mut.rs
+++ b/clippy_lints/src/mut_mut.rs
@@ -73,7 +73,7 @@ impl<'a, 'tcx> intravisit::Visitor<'tcx> for MutVisitor<'a, 'tcx> {
             } else if let ty::TyRef(
                 _,
                 _,
-                _,
+                hir::MutMutable,
             ) = self.cx.tables.expr_ty(e).sty
             {
                 span_lint(
diff --git a/clippy_lints/src/mut_reference.rs b/clippy_lints/src/mut_reference.rs
index a59909c48c89..1184433c4dde 100644
--- a/clippy_lints/src/mut_reference.rs
+++ b/clippy_lints/src/mut_reference.rs
@@ -64,7 +64,7 @@ fn check_arguments<'a, 'tcx>(cx: &LateContext<'a, 'tcx>, arguments: &[Expr], typ
                     ty::TyRef(
                         _,
                         _,
-                        _,
+                        MutImmutable,
                     ) |
                     ty::TyRawPtr(ty::TypeAndMut {
                         mutbl: MutImmutable,
diff --git a/clippy_lints/src/ptr.rs b/clippy_lints/src/ptr.rs
index fb9369c78a02..240b93e57299 100644
--- a/clippy_lints/src/ptr.rs
+++ b/clippy_lints/src/ptr.rs
@@ -153,7 +153,7 @@ fn check_fn(cx: &LateContext, decl: &FnDecl, fn_id: NodeId, opt_body_id: Option<
         if let ty::TyRef(
             _,
             ty,
-            _
+            MutImmutable
         ) = ty.sty
         {
             if match_type(cx, ty, &paths::VEC) {