diff --git a/tutorials/interDyMFoam/sloshingTank2D/constant/polyMesh/blockMeshDict.m4 b/tutorials/interDyMFoam/sloshingTank2D/constant/polyMesh/blockMeshDict.m4
index 0473efbc15..b6c1cdd4ad 100644
--- a/tutorials/interDyMFoam/sloshingTank2D/constant/polyMesh/blockMeshDict.m4
+++ b/tutorials/interDyMFoam/sloshingTank2D/constant/polyMesh/blockMeshDict.m4
@@ -15,8 +15,8 @@ FoamFile
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 // General m4 macros
 
-changecom(//)changequote([,])
-define(calc, [esyscmd(perl -e 'use Math::Trig; use POSIX; printf ($1)')])
+changecom(//)changequote([,]) dnl>
+define(calc, [esyscmd(perl -e 'use Math::Trig; print ($1)')]) dnl>
 define(VCOUNT, 0)
 define(vlabel, [[// ]Vertex $1 = VCOUNT define($1, VCOUNT)define([VCOUNT], incr(VCOUNT))])
 
diff --git a/tutorials/interDyMFoam/sloshingTank2D3DoF/constant/polyMesh/blockMeshDict.m4 b/tutorials/interDyMFoam/sloshingTank2D3DoF/constant/polyMesh/blockMeshDict.m4
index 5f286a9a6b..b6c1cdd4ad 100644
--- a/tutorials/interDyMFoam/sloshingTank2D3DoF/constant/polyMesh/blockMeshDict.m4
+++ b/tutorials/interDyMFoam/sloshingTank2D3DoF/constant/polyMesh/blockMeshDict.m4
@@ -15,8 +15,8 @@ FoamFile
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 // General m4 macros
 
-changecom(//)changequote([,])
-define(calc, [esyscmd(perl -e 'use Math::Trig; use POSIX; print ($1)')])
+changecom(//)changequote([,]) dnl>
+define(calc, [esyscmd(perl -e 'use Math::Trig; print ($1)')]) dnl>
 define(VCOUNT, 0)
 define(vlabel, [[// ]Vertex $1 = VCOUNT define($1, VCOUNT)define([VCOUNT], incr(VCOUNT))])
 
diff --git a/tutorials/interDyMFoam/sloshingTank3D/constant/polyMesh/blockMeshDict.m4 b/tutorials/interDyMFoam/sloshingTank3D/constant/polyMesh/blockMeshDict.m4
index d001104991..f97859e6bf 100644
--- a/tutorials/interDyMFoam/sloshingTank3D/constant/polyMesh/blockMeshDict.m4
+++ b/tutorials/interDyMFoam/sloshingTank3D/constant/polyMesh/blockMeshDict.m4
@@ -15,8 +15,8 @@ FoamFile
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 // General m4 macros
 
-changecom(//)changequote([,])
-define(calc, [esyscmd(perl -e 'use Math::Trig; use POSIX; printf ($1)')])
+changecom(//)changequote([,]) dnl>
+define(calc, [esyscmd(perl -e 'use Math::Trig; print ($1)')]) dnl>
 define(VCOUNT, 0)
 define(vlabel, [[// ]Vertex $1 = VCOUNT define($1, VCOUNT)define([VCOUNT], incr(VCOUNT))])
 
diff --git a/tutorials/interDyMFoam/sloshingTank3D3DoF/constant/polyMesh/blockMeshDict.m4 b/tutorials/interDyMFoam/sloshingTank3D3DoF/constant/polyMesh/blockMeshDict.m4
index 0b91b83dd2..f97859e6bf 100644
--- a/tutorials/interDyMFoam/sloshingTank3D3DoF/constant/polyMesh/blockMeshDict.m4
+++ b/tutorials/interDyMFoam/sloshingTank3D3DoF/constant/polyMesh/blockMeshDict.m4
@@ -15,8 +15,8 @@ FoamFile
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 // General m4 macros
 
-changecom(//)changequote([,])
-define(calc, [esyscmd(perl -e 'use Math::Trig; use POSIX; print ($1)')])
+changecom(//)changequote([,]) dnl>
+define(calc, [esyscmd(perl -e 'use Math::Trig; print ($1)')]) dnl>
 define(VCOUNT, 0)
 define(vlabel, [[// ]Vertex $1 = VCOUNT define($1, VCOUNT)define([VCOUNT], incr(VCOUNT))])
 
diff --git a/tutorials/interDyMFoam/sloshingTank3D6DoF/constant/polyMesh/blockMeshDict.m4 b/tutorials/interDyMFoam/sloshingTank3D6DoF/constant/polyMesh/blockMeshDict.m4
index 0b91b83dd2..f97859e6bf 100644
--- a/tutorials/interDyMFoam/sloshingTank3D6DoF/constant/polyMesh/blockMeshDict.m4
+++ b/tutorials/interDyMFoam/sloshingTank3D6DoF/constant/polyMesh/blockMeshDict.m4
@@ -15,8 +15,8 @@ FoamFile
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 // General m4 macros
 
-changecom(//)changequote([,])
-define(calc, [esyscmd(perl -e 'use Math::Trig; use POSIX; print ($1)')])
+changecom(//)changequote([,]) dnl>
+define(calc, [esyscmd(perl -e 'use Math::Trig; print ($1)')]) dnl>
 define(VCOUNT, 0)
 define(vlabel, [[// ]Vertex $1 = VCOUNT define($1, VCOUNT)define([VCOUNT], incr(VCOUNT))])