diff --git a/src/parser/scanner.ts b/src/parser/scanner.ts
index 21d42f28..c1b07983 100644
--- a/src/parser/scanner.ts
+++ b/src/parser/scanner.ts
@@ -582,7 +582,6 @@ export class Scanner implements ITokenStream {
 				break;
 			}
 			if (this.stream.char === '\n') {
-				this.stream.next();
 				break;
 			}
 			this.stream.next();
diff --git a/test/index.ts b/test/index.ts
index 7eb82f9b..2c28d4ac 100644
--- a/test/index.ts
+++ b/test/index.ts
@@ -341,6 +341,15 @@ describe('Comment', () => {
 		const res = await exe('<: "//"');
 		eq(res, STR('//'));
 	});
+
+	test.concurrent('line tail', async () => {
+		const res = await exe(`
+		let x = 'a' // comment
+		let y = 'b'
+		<: x
+		`);
+		eq(res, STR('a'));
+	});
 });
 
 test.concurrent('式にコロンがあってもオブジェクトと判定されない', async () => {