diff --git a/gcc/rust/util/rust-hir-map.cc b/gcc/rust/util/rust-hir-map.cc
index 9af77a9600ba..40b5167f0257 100644
--- a/gcc/rust/util/rust-hir-map.cc
+++ b/gcc/rust/util/rust-hir-map.cc
@@ -263,7 +263,7 @@ void
 Mappings::insert_hir_trait_item (CrateNum crateNum, HirId id,
 				 HIR::TraitItem *item)
 {
-  rust_assert (lookup_hir_item (crateNum, id) == nullptr);
+  rust_assert (lookup_hir_trait_item (crateNum, id) == nullptr);
 
   hirTraitItemMappings[crateNum][id] = item;
   nodeIdToHirMappings[crateNum][item->get_mappings ().get_nodeid ()] = id;