diff --git a/src/libcore/option.rs b/src/libcore/option.rs
index 2f261b0628faf..6a217f34b6add 100644
--- a/src/libcore/option.rs
+++ b/src/libcore/option.rs
@@ -605,6 +605,8 @@ impl<T> Option<T> {
     /// Returns `None` if the option is `None`, otherwise calls `f` with the
     /// wrapped value and returns the result.
     ///
+    /// Some languages call this operation flatmap.
+    ///
     /// # Example
     ///
     /// ```