diff --git a/PBot/IRC/Event.pm b/PBot/IRC/Event.pm
index 652d9dba..af6bf171 100644
--- a/PBot/IRC/Event.pm
+++ b/PBot/IRC/Event.pm
@@ -422,7 +422,7 @@ sub trans {
     483 => "cantkillserver",
     484 => "ischanservice",        # Undernet Extension, Kajetan@Hinner.com, 17/10/98
     485 => "killdeny",             # UnrealIrcd, Hendrik Frenzel
-    486 => "htmdisabled",          # UnrealIrcd, Hendrik Frenzel
+    486 => "nononreg",             # UnrealIrcd, Hendrik Frenzel   # renamed to nononreg - pragma June 24, 2021
     489 => "secureonlychan",       # UnrealIrcd, Hendrik Frenzel
     491 => "nooperhost",
     492 => "noservicehost",
diff --git a/PBot/IRCHandlers.pm b/PBot/IRCHandlers.pm
index 2470ffeb..ea30ef1e 100644
--- a/PBot/IRCHandlers.pm
+++ b/PBot/IRCHandlers.pm
@@ -58,6 +58,7 @@ sub initialize {
     $ed->register_handler('irc.notregistered', sub { $self->log_first_arg    (@_) });
     $ed->register_handler('irc.n_local',       sub { $self->log_third_arg    (@_) });
     $ed->register_handler('irc.n_global',      sub { $self->log_third_arg    (@_) });
+    $ed->register_handler('irc.nononreg',      sub { $self->on_nononreg      (@_) });
 
     # IRCv3 client capabilities
     $ed->register_handler('irc.cap', sub { $self->on_cap(@_) });
@@ -882,6 +883,16 @@ sub on_topicinfo {
     return 0;
 }
 
+sub on_nononreg {
+    my ($self, $event_type, $event) = @_;
+
+    my $target = $event->{event}->{args}->[1];
+
+    $self->{pbot}->{logger}->log("Cannot send private /msg to $target; they are blocking unidentified /msgs.\n");
+
+    return 0;
+}
+
 sub log_first_arg {
     my ($self, $event_type, $event) = @_;
     $self->{pbot}->{logger}->log("$event->{event}->{args}->[1]\n");