diff --git a/Content.Server/GameObjects/Components/Atmos/Piping/Pumps/PressurePumpComponent.cs b/Content.Server/GameObjects/Components/Atmos/Piping/Pumps/PressurePumpComponent.cs
index 33c1ceaa2d..3ccff576bb 100644
--- a/Content.Server/GameObjects/Components/Atmos/Piping/Pumps/PressurePumpComponent.cs
+++ b/Content.Server/GameObjects/Components/Atmos/Piping/Pumps/PressurePumpComponent.cs
@@ -1,4 +1,5 @@
-using System;
+#nullable enable
+using System;
 using Content.Server.Atmos;
 using Robust.Shared.GameObjects;
 using Robust.Shared.Serialization;
diff --git a/Content.Server/GameObjects/Components/Atmos/Piping/Pumps/VolumePumpComponent.cs b/Content.Server/GameObjects/Components/Atmos/Piping/Pumps/VolumePumpComponent.cs
index 614a7487af..d9c8c27a28 100644
--- a/Content.Server/GameObjects/Components/Atmos/Piping/Pumps/VolumePumpComponent.cs
+++ b/Content.Server/GameObjects/Components/Atmos/Piping/Pumps/VolumePumpComponent.cs
@@ -1,4 +1,5 @@
-using System;
+#nullable enable
+using System;
 using Content.Server.Atmos;
 using Robust.Shared.GameObjects;
 using Robust.Shared.Serialization;
diff --git a/Content.Server/GameObjects/Components/Atmos/Piping/Scrubbers/PressureSiphon.cs b/Content.Server/GameObjects/Components/Atmos/Piping/Scrubbers/PressureSiphon.cs
index a48537d6f5..dd66336038 100644
--- a/Content.Server/GameObjects/Components/Atmos/Piping/Scrubbers/PressureSiphon.cs
+++ b/Content.Server/GameObjects/Components/Atmos/Piping/Scrubbers/PressureSiphon.cs
@@ -1,4 +1,5 @@
-using System;
+#nullable enable
+using System;
 using Content.Server.Atmos;
 using Content.Shared.Atmos;
 using Robust.Shared.GameObjects;
diff --git a/Content.Server/GameObjects/Components/Atmos/Piping/Vents/PressureVentComponent.cs b/Content.Server/GameObjects/Components/Atmos/Piping/Vents/PressureVentComponent.cs
index 7f853a7761..e84c67ec9f 100644
--- a/Content.Server/GameObjects/Components/Atmos/Piping/Vents/PressureVentComponent.cs
+++ b/Content.Server/GameObjects/Components/Atmos/Piping/Vents/PressureVentComponent.cs
@@ -1,4 +1,5 @@
-using Content.Server.Atmos;
+#nullable enable
+using Content.Server.Atmos;
 using Content.Shared.Atmos;
 using Robust.Shared.GameObjects;
 using Robust.Shared.Serialization;