diff --git a/src/test/codegen/slice-as_chunks.rs b/src/test/codegen/slice-as_chunks.rs
index 7b857879eea..48e3f73fc86 100644
--- a/src/test/codegen/slice-as_chunks.rs
+++ b/src/test/codegen/slice-as_chunks.rs
@@ -1,6 +1,7 @@
 // no-system-llvm
 // compile-flags: -O
 // only-64bit (because the LLVM type of i64 for usize shows up)
+// ignore-debug: the debug assertions get in the way
 
 #![crate_type = "lib"]
 #![feature(slice_as_chunks)]