diff --git a/apps/showcases/PorousMediaGPU/roughWall.prm b/apps/showcases/PorousMediaGPU/roughWall.prm
index fc4b740ff9bc6e4baa03ef0500a3290447982397..8215f12bf9e8fe4ed022bebce95ceab08aac95db 100644
--- a/apps/showcases/PorousMediaGPU/roughWall.prm
+++ b/apps/showcases/PorousMediaGPU/roughWall.prm
@@ -29,10 +29,10 @@ Turbulence
     U_c < 2.0, 0.0, 0.0 >;
 }
 
-genericPorousMatrix
+RoughWall
 {
-    poreSize 2;
-    barSize 1;
+    hemispheresRadius 1;
+    hemispheresDistance 4;
 }
 
 DomainSetup