diff --git a/src/libcore/char.rs b/src/libcore/char.rs
index 87a9b24ce6d8..6f3466fb00b2 100644
--- a/src/libcore/char.rs
+++ b/src/libcore/char.rs
@@ -37,7 +37,7 @@ export is_alphabetic,
        is_XID_start, is_XID_continue,
        is_lowercase, is_uppercase,
        is_whitespace, is_alphanumeric,
-       is_ascii,
+       is_ascii, is_digit,
        to_digit, to_lower, to_upper, maybe_digit, cmp;
 
 import is_alphabetic = unicode::derived_property::Alphabetic;