diff --git a/src/asn1_types/any.rs b/src/asn1_types/any.rs
index a47bcd7..c9a2f04 100644
--- a/src/asn1_types/any.rs
+++ b/src/asn1_types/any.rs
@@ -2,7 +2,7 @@ use crate::ber::*;
 use crate::*;
 use alloc::borrow::Cow;
 #[cfg(not(feature = "std"))]
-use alloc::string::String;
+use alloc::string::{String, ToString};
 use core::convert::{TryFrom, TryInto};
 
 use self::debug::trace;