diff --git a/onvif/scripts/zmonvif-probe.pl b/onvif/scripts/zmonvif-probe.pl
index 9d4e67fd2..ed81e3961 100755
--- a/onvif/scripts/zmonvif-probe.pl
+++ b/onvif/scripts/zmonvif-probe.pl
@@ -114,12 +114,20 @@ sub interpret_messages
     my $xaddr;  
     foreach my $l_xaddr (split ' ', $result->get_ProbeMatch()->get_XAddrs()) {
   #   find IPv4 address
+      if($verbose) {
+        print "l_xaddr = $l_xaddr\n";
+      }
       if($l_xaddr =~ m|//[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+[:/]|) {
         $xaddr = $l_xaddr;
         last;
+      } else {
+        print STDERR "Unable to find IPv4 address from xaddr $l_xaddr\n";
       }
     }
 
+    # No usable address found
+    next if not $xaddr;
+
     # ignore multiple responses from one service
     next if defined $services{$xaddr};
     $services{$xaddr} = 1;