diff --git a/src/librustc/lint/builtin.rs b/src/librustc/lint/builtin.rs
index 6f1287014d7..56e639387f8 100644
--- a/src/librustc/lint/builtin.rs
+++ b/src/librustc/lint/builtin.rs
@@ -116,7 +116,7 @@ declare_lint!(UNUSED_COMPARISONS, Warn,
 declare_lint!(OVERFLOWING_LITERALS, Warn,
               "literal out of range for its type")
 
-declare_lint!(EXCEEDING_BITSHIFTS, Allow,
+declare_lint!(EXCEEDING_BITSHIFTS, Deny,
               "shift exceeds the type's number of bits")
 
 pub struct TypeLimits {