diff --git a/src/librustc/mir/interpret/allocation.rs b/src/librustc/mir/interpret/allocation.rs
index 433c105231e0..35b8a5fda4fe 100644
--- a/src/librustc/mir/interpret/allocation.rs
+++ b/src/librustc/mir/interpret/allocation.rs
@@ -26,7 +26,7 @@ pub enum InboundsCheck {
 #[derive(Debug, Copy, Clone, RustcEncodable, RustcDecodable, HashStable)]
 pub enum CheckInAllocMsg {
     MemoryAccess,
-    NullPointer,
+    NullPointerTest,
     PointerArithmetic,
     OutOfBounds,
 }