diff --git a/nping/ArgParser.cc b/nping/ArgParser.cc
index b74a257e3..2cf8447ac 100644
--- a/nping/ArgParser.cc
+++ b/nping/ArgParser.cc
@@ -1072,7 +1072,7 @@ int ArgParser::parseArguments(int argc, char *argv[]) {
         }else if( parse_u32(optarg, &aux32) == OP_SUCCESS ){
             o.setPacketCount(aux32);
         }else{
-            nping_fatal(QT_3,"Packet count must be an integer greater than 0.");
+            nping_fatal(QT_3,"Packet count must be an integer greater than or equal to 0.");
         }
     break; /* case 'c': */
 
diff --git a/nping/NpingOps.cc b/nping/NpingOps.cc
index de8f30346..0c9f7be01 100644
--- a/nping/NpingOps.cc
+++ b/nping/NpingOps.cc
@@ -654,10 +654,10 @@ bool NpingOps::issetShowSentPackets(){
  ******************************************************************************/
 
 /** Sets packet count (number of packets that should be sent to each target)
- *  Supplied parameter must be a positive integer >0.
+ *  Supplied parameter must be a non-negative integer.
  *  @return OP_SUCCESS on success and OP_FAILURE in case of error.           */
 int NpingOps::setPacketCount(u32 val){
-  /* If zero is supplied, set highest value */
+  /* If zero is supplied, use the highest possible value */
   if( val==0 )
     this->pcount=0xFFFFFFFF;
   else