diff --git a/compiler/rustc_trait_selection/src/traits/coherence.rs b/compiler/rustc_trait_selection/src/traits/coherence.rs
index 6c3ce3ee371..94a4001bbb9 100644
--- a/compiler/rustc_trait_selection/src/traits/coherence.rs
+++ b/compiler/rustc_trait_selection/src/traits/coherence.rs
@@ -368,7 +368,6 @@ fn negative_impl_exists<'cx, 'tcx>(
     }
 
     // Try to prove a negative obligation exist for super predicates
-    // FIXME we should implement an `assemble_neg_candidates` fn
     for o in util::elaborate_predicates(infcx.tcx, iter::once(o.predicate)) {
         if resolve_negative_obligation(infcx, param_env, region_context, &o) {
             return true;