diff --git a/src/parser.c b/src/parser.c
index 2367347..06df16f 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -62,7 +62,7 @@ struct parser_event * parser_feed(struct parser *p, const uint8_t c) {
     return &p->e1;
 }
 
-static const unsigned classes[0xFF] = {0x00};
+static const unsigned classes[0xFF + 1] = {0x00};
 
 const unsigned * parser_no_classes(void) {
     return classes;