1 files changed, 2 insertions, 2 deletions
diff --git a/compiler/rustc_borrowck/src/diagnostics/outlives_suggestion.rs b/compiler/rustc_borrowck/src/diagnostics/outlives_suggestion.rs
index 1eaf0a2f1..d5ece5743 100644
--- a/compiler/rustc_borrowck/src/diagnostics/outlives_suggestion.rs
+++ b/compiler/rustc_borrowck/src/diagnostics/outlives_suggestion.rs
@@ -1,7 +1,7 @@
 //! Contains utilities for generating suggestions for borrowck errors related to unsatisfied
 //! outlives constraints.
 
-use rustc_data_structures::fx::FxHashSet;
+use rustc_data_structures::fx::FxIndexSet;
 use rustc_errors::Diagnostic;
 use rustc_middle::ty::RegionVid;
 use smallvec::SmallVec;
@@ -87,7 +87,7 @@ impl OutlivesSuggestionBuilder {
 
         // Keep track of variables that we have already suggested unifying so that we don't print
         // out silly duplicate messages.
-        let mut unified_already = FxHashSet::default();
+        let mut unified_already = FxIndexSet::default();
 
         for (fr, outlived) in &self.constraints_to_add {
             let Some(fr_name) = self.region_vid_to_name(mbcx, *fr) else {