diff --git a/src/test/ui/rfc-2632-const-trait-impl/specializing-constness.stderr b/src/test/ui/rfc-2632-const-trait-impl/specializing-constness.stderr
index 281ba82d6442..843fc6ce84d4 100644
--- a/src/test/ui/rfc-2632-const-trait-impl/specializing-constness.stderr
+++ b/src/test/ui/rfc-2632-const-trait-impl/specializing-constness.stderr
@@ -4,7 +4,7 @@ error: cannot specialize on const impl with non-const impl
 LL | impl<T: Default + Sup> A for T {
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-error: missing `~const` qualifier
+error: missing `~const` qualifier for specialization
   --> $DIR/specializing-constness.rs:20:9
    |
 LL | impl<T: Default + Sup> A for T {