diff --git a/src/libhexfloat/lib.rs b/src/libhexfloat/lib.rs
index 2859e1c985f5e..9adeeb2e4c924 100644
--- a/src/libhexfloat/lib.rs
+++ b/src/libhexfloat/lib.rs
@@ -37,7 +37,8 @@ fn main() {
 */
 
 #![crate_name = "hexfloat"]
-#![experimental]
+#![deprecated = "This is now a cargo package located at: \
+                 https://github.com/rust-lang/hexfloat"]
 #![crate_type = "rlib"]
 #![crate_type = "dylib"]
 #![license = "MIT/ASL2"]