diff --git a/WeakAuras/Prototypes.lua b/WeakAuras/Prototypes.lua
index ce222b2..96c2f30 100644
--- a/WeakAuras/Prototypes.lua
+++ b/WeakAuras/Prototypes.lua
@@ -623,6 +623,7 @@ function WeakAuras.IsSpellKnown(spell, pet)
     end
     return IsSpellKnown(spell);
   end
+  return false
 end
 
 function WeakAuras.IsSpellKnownIncludingPet(spell)