diff --git a/Content.Server/Temperature/Components/TemperatureComponent.cs b/Content.Server/Temperature/Components/TemperatureComponent.cs
index 920418dc7c..0a0a77486f 100644
--- a/Content.Server/Temperature/Components/TemperatureComponent.cs
+++ b/Content.Server/Temperature/Components/TemperatureComponent.cs
@@ -39,9 +39,9 @@ namespace Content.Server.Temperature.Components
         {
             get
             {
-                if (IoCManager.Resolve<IEntityManager>().TryGetComponent<IPhysBody?>(Owner, out var physics) && physics.Mass != 0)
+                if (IoCManager.Resolve<IEntityManager>().TryGetComponent<IPhysBody?>(Owner, out var physics) && physics.FixturesMass != 0)
                 {
-                    return SpecificHeat * physics.Mass;
+                    return SpecificHeat * physics.FixturesMass;
                 }
 
                 return Atmospherics.MinimumHeatCapacity;