diff --git a/src/Backends/REFPROP/REFPROPMixtureBackend.cpp b/src/Backends/REFPROP/REFPROPMixtureBackend.cpp
index b7a94d5e..c3b87c77 100644
--- a/src/Backends/REFPROP/REFPROPMixtureBackend.cpp
+++ b/src/Backends/REFPROP/REFPROPMixtureBackend.cpp
@@ -548,7 +548,7 @@ void REFPROPMixtureBackend::set_REFPROP_fluids(const std::vector<std::string> &f
     }
 
 	// Load REFPROP if it isn't loaded yet
-	//load_REFPROP(); // This should not be needed.
+	load_REFPROP(); // This should not be needed.
 
 	// If the name of the refrigerant doesn't match
     // that of the currently loaded refrigerant