diff --git a/nping/NpingOps.cc b/nping/NpingOps.cc
index 07bbc7274..4c9fe56f8 100644
--- a/nping/NpingOps.cc
+++ b/nping/NpingOps.cc
@@ -374,31 +374,31 @@ char * NpingOps::mode2Ascii(int md) {
 
   switch( md ){
     case TCP_CONNECT:
-        sprintf(buff, "TCP-Connect");
+        bufset(buff, "TCP-Connect");
     break;
 
     case TCP:
-        sprintf(buff, "TCP");
+        bufset(buff, "TCP");
     break;
 
     case UDP:
-        sprintf(buff, "UDP");
+        bufset(buff, "UDP");
     break;
 
     case UDP_UNPRIV:
-        sprintf(buff, "UDP-Unprivileged");
+        bufset(buff, "UDP-Unprivileged");
     break;
 
     case ICMP:
-        sprintf(buff, "ICMP");
+        bufset(buff, "ICMP");
     break;
 
     case ARP:
-        sprintf(buff, "ARP");
+        bufset(buff, "ARP");
     break;
 
     default:
-        sprintf(buff, "Unknown mode");
+        bufset(buff, "Unknown mode");
     break;
  }
  return buff;
diff --git a/nping/ProbeMode.cc b/nping/ProbeMode.cc
index 4697996cb..7238923fd 100644
--- a/nping/ProbeMode.cc
+++ b/nping/ProbeMode.cc
@@ -1209,7 +1209,7 @@ const char *ProbeMode::getBPFFilterString(){
     inet_ntop(AF_INET, &s4->sin_addr, ipstring, sizeof(ipstring));
  }else{
     nping_warning(QT_2, "Warning: Wrong address family (%d) in getBPFFilterString(). Please report a bug", srcss.ss_family);
-    sprintf(ipstring,"127.0.0.1");
+    bufset(ipstring,"127.0.0.1");
  }
 
  /* Tell the filter that we only want incoming packets, destined to our source IP */