diff --git a/lib/active_force/active_query.rb b/lib/active_force/active_query.rb
index 74d5775..458ddab 100644
--- a/lib/active_force/active_query.rb
+++ b/lib/active_force/active_query.rb
@@ -167,7 +167,8 @@ def raise_if_bind_arity_mismatch(expected_var_count, actual_var_count)
 
     def build_conditions_from_hash(hash)
       hash.map do |key, value|
-        applicable_predicate mappings[key], value
+        field = mappings.fetch(key, key&.to_s)
+        applicable_predicate(field, value)
       end
     end
 
diff --git a/spec/active_force/active_query_spec.rb b/spec/active_force/active_query_spec.rb
index e8d485e..361298e 100644
--- a/spec/active_force/active_query_spec.rb
+++ b/spec/active_force/active_query_spec.rb
@@ -296,6 +296,18 @@
         end
       end
     end
+
+    context 'when given attributes Hash with fields that do not exist on the SObject' do
+      it 'uses the given key in an eq condition' do
+        expected = 'SELECT Id FROM table_name WHERE (no_attribute = 1) AND (another_one = 2)'
+        expect(active_query.where(no_attribute: 1, 'another_one' => 2).to_s).to eq(expected)
+      end
+
+      it 'uses the given key in an in condition' do
+        expected = 'SELECT Id FROM table_name WHERE (no_attribute IN (1,2))'
+        expect(active_query.where(no_attribute: [1, 2]).to_s).to eq(expected)
+      end
+    end
   end
 
   describe '#not' do