diff --git a/redox-rt/src/lib.rs b/redox-rt/src/lib.rs
index 72dcf426ae..1d0906a057 100644
--- a/redox-rt/src/lib.rs
+++ b/redox-rt/src/lib.rs
@@ -1,5 +1,6 @@
 #![no_std]
 #![feature(
+    asm_const,
     array_chunks,
     int_roundings,
     let_chains,