diff --git a/Shorewall/Perl/Shorewall/Rules.pm b/Shorewall/Perl/Shorewall/Rules.pm
index 77b10c365..ef1420738 100644
--- a/Shorewall/Perl/Shorewall/Rules.pm
+++ b/Shorewall/Perl/Shorewall/Rules.pm
@@ -2095,6 +2095,8 @@ sub process_rule ( $$$$$$$$$$$$$$$$$$$ ) {
 	if ( $inline_matches =~ /^(.*\s+)-j\s+(.+)$/ ) {
 	    $matches .= $1;
 	    $action = $2;
+	    my ( $target ) = split ' ', $action;
+	    fatal_error "Unknown jump target ($action)" unless $targets{$target};
 	    fatal_error "INLINE may not have a parameter when '-j' is specified in the free-form area" if $param ne '';
 	} else {
 	    $matches .= "$inline_matches ";