1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/rustc_errors/src/lib.rs b/compiler/rustc_errors/src/lib.rs
index bd421a441f9..6f0090a0bd6 100644
--- a/compiler/rustc_errors/src/lib.rs
+++ b/compiler/rustc_errors/src/lib.rs
@@ -1529,7 +1529,7 @@ impl DiagCtxtInner {
             // Future breakages aren't emitted if they're `Level::Allow` or
             // `Level::Expect`, but they still need to be constructed and
             // stashed below, so they'll trigger the must_produce_diag check.
-            assert_matches!(diagnostic.level, Error | Warning | Allow | Expect);
+            assert_matches!(diagnostic.level, Error | ForceWarning | Warning | Allow | Expect);
             self.future_breakage_diagnostics.push(diagnostic.clone());
         }