diff --git a/examples/a.talc b/examples/a.talc
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/examples/a.talc
@@ -0,0 +1 @@
+
diff --git a/talc-lang/src/parser/lexer.rs b/talc-lang/src/parser/lexer.rs
index f0dad76..ecc178b 100644
--- a/talc-lang/src/parser/lexer.rs
+++ b/talc-lang/src/parser/lexer.rs
@@ -373,9 +373,6 @@ impl<'s> Lexer<'s> {
 
 	fn next_number(&mut self) -> Result<Token<'s>> {
 		if self.next()? == '0' {
-			while self.peek()? == '_' {
-				self.next()?;
-			}
 			match self.peek()? {
 				'x' => {
 					self.next()?;
@@ -393,7 +390,7 @@ impl<'s> Lexer<'s> {
 					self.next()?;
 					return self.next_int_base(2)
 				}
-				'0'..='9' | '.' | 'e' | 'i' => (),
+				'0'..='9' | '_' | '.' | 'e' | 'i' => (),
 				c if is_xid_start(c) => return self.unexpected(),
 				_ => return self.emit(K::Integer),
 			}
diff --git a/talc-lang/src/parser/util.rs b/talc-lang/src/parser/util.rs
index 08cfb83..576dacb 100644
--- a/talc-lang/src/parser/util.rs
+++ b/talc-lang/src/parser/util.rs
@@ -148,7 +148,7 @@ pub fn parse_int<'a, S: Into<&'a LStr>>(f: S, radix: u32) -> Result<i64, ParseIn
 
 pub fn parse_int_literal<'a, S: Into<&'a LStr>>(f: S) -> Result<i64, ParseIntError> {
 	let f = f.into();
-	match f.chars().nth(2) {
+	match f.chars().nth(1) {
 		Some('x') => parse_int(&f[2..], 16),
 		Some('o') => parse_int(&f[2..], 8),
 		Some('s') => parse_int(&f[2..], 6),