1 files changed, 3 insertions, 3 deletions
diff --git a/compiler/rustc_serialize/src/opaque.rs b/compiler/rustc_serialize/src/opaque.rs
index 27e9f817894..d4907b69b72 100644
--- a/compiler/rustc_serialize/src/opaque.rs
+++ b/compiler/rustc_serialize/src/opaque.rs
@@ -280,13 +280,13 @@ impl<'a> MemDecoder<'a> {
     #[inline]
     pub fn len(&self) -> usize {
         // SAFETY: This recovers the length of the original slice, only using members we never modify.
-        unsafe { self.end.sub_ptr(self.start) }
+        unsafe { self.end.offset_from_unsigned(self.start) }
     }
 
     #[inline]
     pub fn remaining(&self) -> usize {
         // SAFETY: This type guarantees current <= end.
-        unsafe { self.end.sub_ptr(self.current) }
+        unsafe { self.end.offset_from_unsigned(self.current) }
     }
 
     #[cold]
@@ -400,7 +400,7 @@ impl<'a> Decoder for MemDecoder<'a> {
     #[inline]
     fn position(&self) -> usize {
         // SAFETY: This type guarantees start <= current
-        unsafe { self.current.sub_ptr(self.start) }
+        unsafe { self.current.offset_from_unsigned(self.start) }
     }
 }