diff --git a/src/libcollections/slice.rs b/src/libcollections/slice.rs
index d49463911e6..c4d9ef844eb 100644
--- a/src/libcollections/slice.rs
+++ b/src/libcollections/slice.rs
@@ -1025,6 +1025,17 @@ pub trait SliceConcatExt<T: ?Sized> {
     #[stable(feature = "rust1", since = "1.0.0")]
     fn concat(&self) -> Self::Output;
 
+    /// Flattens a slice of `T` into a single value `Self::Output`, placing a
+    /// given separator between each.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// assert_eq!(["hello", "world"].join(" "), "hello world");
+    /// ```
+    #[stable(feature = "rust1", since = "1.0.0")]
+    fn join(&self, sep: &T) -> Self::Output;
+
     /// Flattens a slice of `T` into a single value `Self::Output`, placing a
     /// given separator between each.
     ///
@@ -1034,6 +1045,7 @@ pub trait SliceConcatExt<T: ?Sized> {
     /// assert_eq!(["hello", "world"].connect(" "), "hello world");
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
+    #[deprecated(since = "1.3.0", reason = "renamed to join")]
     fn connect(&self, sep: &T) -> Self::Output;
 }
 
@@ -1049,7 +1061,7 @@ impl<T: Clone, V: Borrow<[T]>> SliceConcatExt<T> for [V] {
         result
     }
 
-    fn connect(&self, sep: &T) -> Vec<T> {
+    fn join(&self, sep: &T) -> Vec<T> {
         let size = self.iter().fold(0, |acc, v| acc + v.borrow().len());
         let mut result = Vec::with_capacity(size + self.len());
         let mut first = true;
@@ -1059,6 +1071,10 @@ impl<T: Clone, V: Borrow<[T]>> SliceConcatExt<T> for [V] {
         }
         result
     }
+
+    fn connect(&self, sep: &T) -> Vec<T> {
+        self.join(sep)
+    }
 }
 
 /// An iterator that yields the element swaps needed to produce
diff --git a/src/libcollections/str.rs b/src/libcollections/str.rs
index 7e72ad1569a..7e4a219fc42 100644
--- a/src/libcollections/str.rs
+++ b/src/libcollections/str.rs
@@ -105,7 +105,7 @@ impl<S: Borrow<str>> SliceConcatExt<str> for [S] {
         result
     }
 
-    fn connect(&self, sep: &str) -> String {
+    fn join(&self, sep: &str) -> String {
         if self.is_empty() {
             return String::new();
         }
@@ -132,6 +132,10 @@ impl<S: Borrow<str>> SliceConcatExt<str> for [S] {
         }
         result
     }
+
+    fn connect(&self, sep: &str) -> String {
+        self.join(sep)
+    }
 }
 
 /*