diff --git a/tutorials/compressible/sonicFoam/laminar/shockTube/system/sampleDict b/tutorials/compressible/sonicFoam/laminar/shockTube/system/sampleDict
index 561612437a..34176d6c3f 100644
--- a/tutorials/compressible/sonicFoam/laminar/shockTube/system/sampleDict
+++ b/tutorials/compressible/sonicFoam/laminar/shockTube/system/sampleDict
@@ -19,9 +19,6 @@ interpolationScheme cellPoint;
 
 setFormat       raw;
 
-surfaceFormat   dx;
-surfaces        ();
-
 sets
 (
     data