diff --git a/lib/freeSteam.py b/lib/freeSteam.py
index a900b109..6fa42e0b 100644
--- a/lib/freeSteam.py
+++ b/lib/freeSteam.py
@@ -80,6 +80,7 @@ class Freesteam(ThermoWater):
          "doi": ""}]
 
     M = unidades.Dimensionless(iapws._iapws.M)
+    print(os.environ["freesteam"])
     if os.environ["freesteam"] == "True":
         Pc = unidades.Pressure(freesteam.PCRIT)
         Tc = unidades.Temperature(freesteam.TCRIT)