Bug: https://bugs.gentoo.org/921572
--- a/os-daq-modules/daq_nfq.c
+++ b/os-daq-modules/daq_nfq.c
@@ -391,7 +391,7 @@ static inline int SetPktHdr (
     DAQ_PktHdr_t* hdr,
     uint8_t** pkt
 ) {
-    int len = nfq_get_payload(nfad, (char**)pkt);
+    int len = nfq_get_payload(nfad, (unsigned char**)pkt);
 
     if ( len <= 0 )
         return -1;