diff --git a/redox-rt/src/proc.rs b/redox-rt/src/proc.rs
index 26b730b861..c04897fb3a 100644
--- a/redox-rt/src/proc.rs
+++ b/redox-rt/src/proc.rs
@@ -647,10 +647,6 @@ impl MmapGuard {
 
         Ok(())
     }
-
-    // Without this inline(never), UB somewhere causes the flags to be set to 0 on arm64.
-    // FIXME Find the UB and fix it
-    #[inline(never)]
     pub unsafe fn map_mut_anywhere<'a>(
         fd: usize,
         offset: usize,