diff --git a/clippy_lints/src/misc.rs b/clippy_lints/src/misc.rs
index 50ae695f4c51..04cc488d562b 100644
--- a/clippy_lints/src/misc.rs
+++ b/clippy_lints/src/misc.rs
@@ -545,11 +545,11 @@ fn check_to_owned(cx: &LateContext, expr: &Expr, other: &Expr) {
 
     // *arg impls PartialEq<other>
     if !arg_ty
-        .builtin_deref(true, ty::LvaluePreference::NoPreference)
+        .builtin_deref(true)
         .map_or(false, |tam| implements_trait(cx, tam.ty, partial_eq_trait_id, &[other_ty]))
         // arg impls PartialEq<*other>
         && !other_ty
-        .builtin_deref(true, ty::LvaluePreference::NoPreference)
+        .builtin_deref(true)
         .map_or(false, |tam| implements_trait(cx, arg_ty, partial_eq_trait_id, &[tam.ty]))
         // arg impls PartialEq<other>
         && !implements_trait(cx, arg_ty, partial_eq_trait_id, &[other_ty])