diff --git a/applications/solvers/compressible/rhoCentralFoam/readThermophysicalProperties.H b/applications/solvers/compressible/rhoCentralFoam/readThermophysicalProperties.H
index f9e309ffec9372161a3b1828003d49c67cd8861d..e0b16f0f390099002f8a61bb07790fe9384b5a37 100644
--- a/applications/solvers/compressible/rhoCentralFoam/readThermophysicalProperties.H
+++ b/applications/solvers/compressible/rhoCentralFoam/readThermophysicalProperties.H
@@ -16,11 +16,8 @@ IOdictionary thermophysicalProperties
 
 dimensionedScalar Pr
 (
-    dimensionedScalar::lookupOrDefault
-    (
-        "Pr",
-        thermophysicalProperties,
-        1.0
-    )
+    "Pr",
+    dimless,
+    thermophysicalProperties.subDict("mixture").subDict("transport")
+   .lookup("Pr")
 );
-