diff --git a/crates/haku/src/lexer.rs b/crates/haku/src/lexer.rs
index f3e4ce2..3ebff7f 100644
--- a/crates/haku/src/lexer.rs
+++ b/crates/haku/src/lexer.rs
@@ -57,7 +57,11 @@ fn one_or_two(l: &mut Lexer<'_>, kind1: TokenKind, c2: char, kind2: TokenKind) -
 }
 
 fn is_ident_char(c: char) -> bool {
-    matches!(c, 'a'..='z' | 'A'..='Z' | '0'..='9' | '_' | '\'' | '?')
+    matches!(c, 'a'..='z' | 'A'..='Z' | '0'..='9' | '_')
+}
+
+fn is_ident_extra_char(c: char) -> bool {
+    matches!(c, '\'' | '?')
 }
 
 fn ident(l: &mut Lexer<'_>) -> TokenKind {
@@ -65,6 +69,9 @@ fn ident(l: &mut Lexer<'_>) -> TokenKind {
     while is_ident_char(l.current()) {
         l.advance();
     }
+    while is_ident_extra_char(l.current()) {
+        l.advance();
+    }
     let end = l.position;
 
     match Span::new(start, end).slice(l.input) {