1 files changed, 2 insertions, 0 deletions
diff --git a/lexer.l b/lexer.l
index 9b1548d..4a593fe 100644
--- a/lexer.l
+++ b/lexer.l
@@ -95,4 +95,6 @@ HEX        [0-9a-f]
 <INITIAL><<EOF>>         {                 return 0;        }
 <<EOF>>                  { BEGIN(INITIAL); return T_EOL;    }
 
+.                        { return T_UNKNOWN; }
+
 %%