diff --git a/src/lib.rs b/src/lib.rs
index 92cc9e4..ba47d25 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -27,8 +27,6 @@
 #![deny(missing_debug_implementations, nonstandard_style)]
 #![recursion_limit = "512"]
 
-extern crate proc_macro;
-
 use proc_macro::TokenStream;
 use quote::{quote, quote_spanned};
 use syn::spanned::Spanned;