diff --git a/opentracker.c b/opentracker.c
index aefdc46..ae33e62 100644
--- a/opentracker.c
+++ b/opentracker.c
@@ -532,8 +532,9 @@ ANNOUNCE_WORKAROUND:
     ot_overall_tcp_successfulannounces++;
     break;
   case 9:
-    if( byte_diff( data, 9, "announce " ) ) HTTPERROR_404;
-    goto ANNOUNCE_WORKAROUND;
+    if( !byte_diff( data, 9, "announce " ) ) goto ANNOUNCE_WORKAROUND;
+    if( !byte_diff( data, 9, "announce/" ) ) goto ANNOUNCE_WORKAROUND;
+    HTTPERROR_404;
   case 10:
     if( byte_diff( data, 10, "scrape.php" ) ) HTTPERROR_404;
     goto SCRAPE_WORKAROUND;