diff --git a/src/libecalc/presentation/json_result/result/results.py b/src/libecalc/presentation/json_result/result/results.py
index d8e12d946e..45d9c3962f 100644
--- a/src/libecalc/presentation/json_result/result/results.py
+++ b/src/libecalc/presentation/json_result/result/results.py
@@ -128,12 +128,16 @@ class PumpResult(EquipmentResultBase):
     outlet_pressure_bar: TimeSeriesFloat
     operational_head: TimeSeriesFloat
 
+    streams: None = None  # Keep to avoid breaking results validation for data with null for streams, was optional and never set before
+
 
 class CompressorResult(EquipmentResultBase):
     componentType: Literal[ComponentType.COMPRESSOR]
     recirculation_loss: TimeSeriesRate
     rate_exceeds_maximum: TimeSeriesBoolean
 
+    streams: None = None  # Keep to avoid breaking results validation for data with null for streams, was optional and never set before
+
 
 class VentingEmitterResult(EquipmentResultBase):
     componentType: Literal[ComponentType.VENTING_EMITTER]