1 files changed, 1 insertions, 2 deletions
diff --git a/src/libsyntax/ext/proc_macro_server.rs b/src/libsyntax/ext/proc_macro_server.rs
index 35feb6680f9..544ec789d80 100644
--- a/src/libsyntax/ext/proc_macro_server.rs
+++ b/src/libsyntax/ext/proc_macro_server.rs
@@ -6,7 +6,6 @@ use crate::tokenstream::{self, DelimSpan, IsJoint::*, TokenStream, TreeAndJoint}
 
 use errors::{Diagnostic, DiagnosticBuilder};
 use rustc_data_structures::sync::Lrc;
-use rustc_lexer::character_properties::{is_id_start, is_id_continue};
 use syntax_pos::{BytePos, FileName, MultiSpan, Pos, SourceFile, Span};
 use syntax_pos::symbol::{kw, sym, Symbol};
 
@@ -323,7 +322,7 @@ impl Ident {
     fn is_valid(string: &str) -> bool {
         let mut chars = string.chars();
         if let Some(start) = chars.next() {
-            is_id_start(start) && chars.all(is_id_continue)
+            rustc_lexer::is_id_start(start) && chars.all(rustc_lexer::is_id_continue)
         } else {
             false
         }