diff --git a/src/cc65/scanner.c b/src/cc65/scanner.c
index 05ba134ee..941fb7519 100644
--- a/src/cc65/scanner.c
+++ b/src/cc65/scanner.c
@@ -283,6 +283,8 @@ static int ParseChar (void)
 		break;
 	    case '0':
 	    case '1':
+	    case '2':
+	    case '3':
 		/* Octal constant */
 		i = 0;
      		C = CurC - '0';