diff --git a/src/playercards/AllCardsBag.ttslua b/src/playercards/AllCardsBag.ttslua
index 0f864339..b0aa65ab 100644
--- a/src/playercards/AllCardsBag.ttslua
+++ b/src/playercards/AllCardsBag.ttslua
@@ -423,7 +423,7 @@ function buildAvailableWeaknesses(restrictions)
       -- disable class restricted weaknesses
       if restrictions.class then
         local card = cardIdIndex[weaknessId]
-        if card.metadata.classRestriction ~= restrictions.class then
+        if card.metadata.classRestriction and card.metadata.classRestriction ~= restrictions.class then
           eligible = false
         end
       end