diff --git a/WeakAuras/Prototypes.lua b/WeakAuras/Prototypes.lua
index 69e3f75..4f4884a 100644
--- a/WeakAuras/Prototypes.lua
+++ b/WeakAuras/Prototypes.lua
@@ -6059,7 +6059,7 @@ Private.event_prototypes = {
 
 };
 
-if not (DBM and tonumber(DBM.Revision) >= 7003) then
+if not (DBM and (tonumber(DBM.Revision) or 0) >= 7003) then
   Private.event_prototypes["DBM Announce"] = nil
   Private.event_prototypes["DBM Timer"] = nil
 end