diff --git a/TargetGroup.cc b/TargetGroup.cc
index c4f84ec3c..f04f64ee8 100644
--- a/TargetGroup.cc
+++ b/TargetGroup.cc
@@ -186,7 +186,7 @@ int TargetGroup::parse_expr(const char * const target_expr, int af) {
         freeaddrinfo(addrs);
 
       if (resolvedaddrs.empty()) {
-        error("Failed to resolve given hostname/IP: %s.  Note that you can't use '/mask' AND '1-4,7,100-' style IP ranges", target_net);
+        error("Failed to resolve given hostname/IP: %s.  Note that you can't use '/mask' AND '1-4,7,100-' style IP ranges. If the machine only has an IPv6 address, add the Nmap -6 flag to scan that.", target_net);
         free(hostexp);
         return 1;
       } else {