diff --git a/src/libcore/slice.rs b/src/libcore/slice.rs
index a8282e5701e..07c14d08c07 100644
--- a/src/libcore/slice.rs
+++ b/src/libcore/slice.rs
@@ -1446,7 +1446,7 @@ pub fn mut_ref_slice<'a, A>(s: &'a mut A) -> &'a mut [A] {
 /// }
 /// ```
 #[inline]
-#[unstable(feature = "core")]
+#[stable(feature = "rust1", since = "1.0.0")]
 pub unsafe fn from_raw_parts<'a, T>(p: *const T, len: usize) -> &'a [T] {
     transmute(RawSlice { data: p, len: len })
 }
@@ -1458,7 +1458,7 @@ pub unsafe fn from_raw_parts<'a, T>(p: *const T, len: usize) -> &'a [T] {
 /// as not being able to provide a non-aliasing guarantee of the returned
 /// mutable slice.
 #[inline]
-#[unstable(feature = "core")]
+#[stable(feature = "rust1", since = "1.0.0")]
 pub unsafe fn from_raw_parts_mut<'a, T>(p: *mut T, len: usize) -> &'a mut [T] {
     transmute(RawSlice { data: p, len: len })
 }