@@ -134,7 +134,7 @@ typedef struct ASFContext {

     // packet state

     uint64_t sub_left;  // subpayloads left or not

-    int nb_sub; // number of subpayloads read so far from the current ASF packet

+    unsigned int nb_sub; // number of subpayloads read so far from the current ASF packet

     uint16_t mult_sub_len; // total length of subpayloads array inside multiple payload

     uint64_t nb_mult_left; // multiple payloads left

     int return_subpayload;