diff --git a/src/gas/gas.cpp b/src/gas/gas.cpp
index ffbef0de..62ad27e9 100644
--- a/src/gas/gas.cpp
+++ b/src/gas/gas.cpp
@@ -113,7 +113,11 @@ std::shared_ptr<StateDescriptor> Initialize(ParameterInput *pin,
       PARTHENON_REQUIRE(mu > 0, "Only positive mean molecular weight allowed!");
       cv = constants.GetKBCode() / ((gamma - 1.) * constants.GetAMUCode() * mu);
     }
-    EOS eos_host = singularity::IdealGas(gamma - 1., cv);
+    EOS eos_host = singularity::UnitSystem<singularity::IdealGas>(
+        singularity::IdealGas(gamma - 1., cv),
+        singularity::eos_units_init::LengthTimeUnitsInit(), units.GetTimeCodeToPhysical(),
+        units.GetMassCodeToPhysical(), units.GetLengthCodeToPhysical(),
+        units.GetTemperatureCodeToPhysical());
     EOS eos_device = eos_host.GetOnDevice();
     params.Add("eos_h", eos_host);
     params.Add("eos_d", eos_device);
diff --git a/src/utils/eos/eos.hpp b/src/utils/eos/eos.hpp
index 85f5b8e2..d1703fab 100644
--- a/src/utils/eos/eos.hpp
+++ b/src/utils/eos/eos.hpp
@@ -22,7 +22,7 @@ namespace ArtemisUtils {
 static constexpr int lambda_max_vals = 1;
 
 // Variant containing all EOSs to be used in Artemis.
-using EOS = singularity::Variant<singularity::IdealGas>;
+using EOS = singularity::Variant<singularity::UnitSystem<singularity::IdealGas>>;
 
 } // namespace ArtemisUtils