diff --git a/MobileFilter/sections/adservers.txt b/MobileFilter/sections/adservers.txt
index 75924abb434..8f702f92e12 100644
--- a/MobileFilter/sections/adservers.txt
+++ b/MobileFilter/sections/adservers.txt
@@ -549,7 +549,7 @@
 ||ads.mobilefuse.net^
 ||ads.mobilityware.com^
 ||ads.mobvertising.net^
-||mopub.com^
+||ads.mopub.com^
 ||ads.n-ws.org^
 ||ads.ookla.com^
 ||ads.pdbarea.com^