diff --git a/src/librustc/lint/builtin.rs b/src/librustc/lint/builtin.rs
index ad0ed39185c1c..174fff84eff35 100644
--- a/src/librustc/lint/builtin.rs
+++ b/src/librustc/lint/builtin.rs
@@ -261,7 +261,7 @@ declare_lint! {
 
 declare_lint! {
     pub BARE_TRAIT_OBJECTS,
-    Allow,
+    Deny,
     "suggest using `dyn Trait` for trait objects"
 }