diff --git a/go/statements.cc b/go/statements.cc
index eb370f8..bea57cd 100644
--- a/go/statements.cc
+++ b/go/statements.cc
@@ -3707,6 +3707,12 @@
       std::vector<Bexpression*> cases;
       Bstatement* stat = p->get_backend(context, break_label, &case_constants,
 					&cases);
+      // The final clause can't fall through.
+      if (i == c - 1 && p->is_fallthrough())
+        {
+          go_assert(saw_errors());
+          stat = context->backend()->error_statement();
+        }
       (*all_cases)[i].swap(cases);
       (*all_statements)[i] = stat;
     }