diff --git a/clippy_lints/src/functions.rs b/clippy_lints/src/functions.rs
index a1918aed69f..0dec4e94c0b 100644
--- a/clippy_lints/src/functions.rs
+++ b/clippy_lints/src/functions.rs
@@ -131,7 +131,7 @@ impl Functions {
 
 fn raw_ptr_arg(cx: &LateContext, arg: &hir::Arg) -> Option<hir::def_id::DefId> {
     if let (&hir::PatKind::Binding(_, _, _), &hir::TyPtr(_)) = (&arg.pat.node, &arg.ty.node) {
-        cx.tcx.def_map.borrow().get(&arg.pat.id).map(hir::def::PathResolution::def_id)
+        cx.tcx.def_map.borrow().get(&arg.pat.id).map(|pr| pr.full_def().def_id())
     } else {
         None
     }
@@ -175,7 +175,7 @@ impl<'a, 'tcx, 'v> hir::intravisit::Visitor<'v> for DerefVisitor<'a, 'tcx> {
 impl<'a, 'tcx: 'a> DerefVisitor<'a, 'tcx> {
     fn check_arg(&self, ptr: &hir::Expr) {
         if let Some(def) = self.cx.tcx.def_map.borrow().get(&ptr.id) {
-            if self.ptrs.contains(&def.def_id()) {
+            if self.ptrs.contains(&def.full_def().def_id()) {
                 span_lint(self.cx,
                           NOT_UNSAFE_PTR_ARG_DEREF,
                           ptr.span,