diff --git a/WeakAuras/GenericTrigger.lua b/WeakAuras/GenericTrigger.lua
index 27858c8b3a..0edd0151b3 100644
--- a/WeakAuras/GenericTrigger.lua
+++ b/WeakAuras/GenericTrigger.lua
@@ -4603,10 +4603,10 @@ function GenericTrigger.SetToolTip(trigger, state)
   local prototype = GenericTrigger.GetPrototype(trigger)
   if prototype then
     if prototype.hasSpellID then
-      GameTooltip:SetSpellByID(trigger.spellName);
+      GameTooltip:SetSpellByID(trigger.spellName or 0);
       return true
     elseif prototype.hasItemID then
-      GameTooltip:SetHyperlink("item:"..trigger.itemName..":0:0:0:0:0:0:0")
+      GameTooltip:SetHyperlink("item:"..(trigger.itemName or 0)..":0:0:0:0:0:0:0")
       return true
     end
   end