diff --git a/include/osmocom/gsm/tlv.h b/include/osmocom/gsm/tlv.h
index 1e59ccaa3..f659411fc 100644
--- a/include/osmocom/gsm/tlv.h
+++ b/include/osmocom/gsm/tlv.h
@@ -236,11 +236,11 @@ struct tlv_def {
 };
 
 struct tlv_definition {
-	struct tlv_def def[265];
+	struct tlv_def def[256];
 };
 
 struct tlv_parsed {
-	struct tlv_p_entry lv[265];
+	struct tlv_p_entry lv[256];
 };
 
 extern struct tlv_definition tvlv_att_def;