diff --git a/SpywareFilter/sections/specific.txt b/SpywareFilter/sections/specific.txt
index a2983fa6d88..4acabfa7e18 100644
--- a/SpywareFilter/sections/specific.txt
+++ b/SpywareFilter/sections/specific.txt
@@ -4835,6 +4835,9 @@ link.gmapp*.net$image
 /CI0/0$image
 %2FCI0%2F0$image
 !
+! AdGuard
+email-link.adtidy.org/open/$image
+email-link.adtidy.org%2Fopen%2F$image
 ! https://github.com/uBlockOrigin/uAssets/issues/29466
 .salesforce.com/servlet/servlet.ImageServer$image
 .salesforce.com%2Fservlet%2Fservlet.ImageServer$image