diff --git a/plugins/zyklonb/factoids b/plugins/zyklonb/factoids
index 4fe7aee..3b6be64 100755
--- a/plugins/zyklonb/factoids
+++ b/plugins/zyklonb/factoids
@@ -79,7 +79,7 @@ sub learn {
 
 	my $entries = $db{$name};
 	return &$respond("duplicate definition")
-		if grep { $_ eq $definition } @$entries;
+		if grep { lc $_ eq lc $definition } @$entries;
 
 	push @$entries, $definition;
 	&$respond("saved as #${\scalar @$entries}");