diff --git a/lib/surus/json/belongs_to_scope_builder.rb b/lib/surus/json/belongs_to_scope_builder.rb
index d5d98f8..1ead61b 100644
--- a/lib/surus/json/belongs_to_scope_builder.rb
+++ b/lib/surus/json/belongs_to_scope_builder.rb
@@ -4,10 +4,18 @@ class BelongsToScopeBuilder < AssociationScopeBuilder
       def scope
         s = association
           .klass
-          .where("#{quote_column_name association.active_record_primary_key}=#{quote_column_name association.foreign_key}")
+          .where("#{association_primary_key}=#{association_foreign_key}")
         s = s.instance_eval(&association.scope) if association.scope
         s
       end
+
+      def association_primary_key
+        "#{association.quoted_table_name}.#{quote_column_name association.active_record_primary_key}"
+      end
+
+      def association_foreign_key
+        "#{outside_class.quoted_table_name}.#{quote_column_name association.foreign_key}"
+      end
     end
   end
 end
diff --git a/lib/surus/json/has_many_scope_builder.rb b/lib/surus/json/has_many_scope_builder.rb
index c1f3264..5683ea3 100644
--- a/lib/surus/json/has_many_scope_builder.rb
+++ b/lib/surus/json/has_many_scope_builder.rb
@@ -14,7 +14,7 @@ def outside_primary_key
       end
 
       def association_foreign_key
-        "#{connection.quote_column_name association.foreign_key}"
+        "#{association.quoted_table_name}.#{connection.quote_column_name association.foreign_key}"
       end
     end
   end