diff --git a/src/thermophysicalModels/specie/equationOfState/PengRobinsonGas/PengRobinsonGasI.H b/src/thermophysicalModels/specie/equationOfState/PengRobinsonGas/PengRobinsonGasI.H
index 5eed831c4..356ff2783 100644
--- a/src/thermophysicalModels/specie/equationOfState/PengRobinsonGas/PengRobinsonGasI.H
+++ b/src/thermophysicalModels/specie/equationOfState/PengRobinsonGas/PengRobinsonGasI.H
@@ -59,9 +59,9 @@ inline Foam::PengRobinsonGas<Specie>::PengRobinsonGas
 :
     Specie(name, pg),
     Tc_(pg.Tc_),
-    Pc_(pg.Pc_),
     Vc_(pg.Vc_),
     Zc_(pg.Zc_),
+    Pc_(pg.Pc_),
     omega_(pg.omega_)
 {}