diff --git a/src/librustc/diagnostics.rs b/src/librustc/diagnostics.rs
index 522c1531c5938..34d31028385cf 100644
--- a/src/librustc/diagnostics.rs
+++ b/src/librustc/diagnostics.rs
@@ -362,6 +362,10 @@ Here are some simple examples of where you'll run into this error:
 struct Foo { x: &bool }        // error
 struct Foo<'a> { x: &'a bool } // correct
 
+struct Bar { x: Foo }
+               ^^^ expected lifetime parameter
+struct Bar<'a> { x: Foo<'a> } // correct
+
 enum Bar { A(u8), B(&bool), }        // error
 enum Bar<'a> { A(u8), B(&'a bool), } // correct