diff --git a/src/sdl2_ttf/lib.rs b/src/sdl2_ttf/lib.rs
index 3e38a9cf..f166cdbe 100644
--- a/src/sdl2_ttf/lib.rs
+++ b/src/sdl2_ttf/lib.rs
@@ -2,6 +2,8 @@
 A binding for SDL2_ttf.
  */
 
+#![feature(custom_attribute)]
+
 #![crate_type = "lib"]
 #![desc = "SDL2_ttf bindings and wrappers"]
 #![comment = "SDL2_ttf bindings and wrappers"]