diff --git a/src/log-pcap.c b/src/log-pcap.c
index 32d5664660..e3460b1a3f 100644
--- a/src/log-pcap.c
+++ b/src/log-pcap.c
@@ -636,6 +636,7 @@ int PcapLogOpenFileCtx(PcapLogData *pl)
     if (pf == NULL) {
         return -1;
     }
+    memset(pf, 0, sizeof(PcapFileName));
 
     if (pl->mode == LOGMODE_SGUIL) {
         struct tm local_tm;