diff --git a/src/libecalc/domain/infrastructure/energy_components/legacy_consumer/consumer_function/direct_expression_consumer_function.py b/src/libecalc/domain/infrastructure/energy_components/legacy_consumer/consumer_function/direct_expression_consumer_function.py
index 4418fcc826..ec501a147c 100644
--- a/src/libecalc/domain/infrastructure/energy_components/legacy_consumer/consumer_function/direct_expression_consumer_function.py
+++ b/src/libecalc/domain/infrastructure/energy_components/legacy_consumer/consumer_function/direct_expression_consumer_function.py
@@ -37,7 +37,7 @@ def __init__(
         direct_consumer_consumption_rate_type = consumption_rate_type
         self._energy_usage_type = energy_usage_type
         self._expression = expression
-        self._convert_to_stream_day = direct_consumer_consumption_rate_type == RateType.CALENDAR_DAY
+        self._convert_to_stream_day = RateType(direct_consumer_consumption_rate_type.value) == RateType.CALENDAR_DAY
         self._condition_expression = condition_expression
         self._power_loss_factor_expression = power_loss_factor_expression