diff --git a/plugins/factoids.pm b/plugins/factoids.pm
index 3cfa6b2..081981d 100644
--- a/plugins/factoids.pm
+++ b/plugins/factoids.pm
@@ -352,7 +352,7 @@ sub _fact_substitute
 		}
 		else
 		{
-			return $pred;
+			return "O:".$pred;
 		}		
 	}
 }