diff --git a/src/libcore/ops.rs b/src/libcore/ops.rs
index 077b44f2dd2a7..d1a3ebe1aa960 100644
--- a/src/libcore/ops.rs
+++ b/src/libcore/ops.rs
@@ -983,8 +983,10 @@ impl fmt::Debug for RangeFull {
 #[stable(feature = "rust1", since = "1.0.0")]
 pub struct Range<Idx> {
     /// The lower bound of the range (inclusive).
+    #[stable(feature = "rust1", since = "1.0.0")]
     pub start: Idx,
     /// The upper bound of the range (exclusive).
+    #[stable(feature = "rust1", since = "1.0.0")]
     pub end: Idx,
 }
 
@@ -1001,11 +1003,10 @@ impl<Idx: fmt::Debug> fmt::Debug for Range<Idx> {
 #[stable(feature = "rust1", since = "1.0.0")]
 pub struct RangeFrom<Idx> {
     /// The lower bound of the range (inclusive).
+    #[stable(feature = "rust1", since = "1.0.0")]
     pub start: Idx,
 }
 
-
-
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<Idx: fmt::Debug> fmt::Debug for RangeFrom<Idx> {
     fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
@@ -1019,6 +1020,7 @@ impl<Idx: fmt::Debug> fmt::Debug for RangeFrom<Idx> {
 #[stable(feature = "rust1", since = "1.0.0")]
 pub struct RangeTo<Idx> {
     /// The upper bound of the range (exclusive).
+    #[stable(feature = "rust1", since = "1.0.0")]
     pub end: Idx,
 }
 
@@ -1029,7 +1031,6 @@ impl<Idx: fmt::Debug> fmt::Debug for RangeTo<Idx> {
     }
 }
 
-
 /// The `Deref` trait is used to specify the functionality of dereferencing
 /// operations like `*v`.
 ///