diff --git a/src/Allwmake b/src/Allwmake
index f22e0729dbe8e50694ee43a373205494b0a2a536..c3ce648ba0aa1462b53dff9a1502db02d5a215aa 100755
--- a/src/Allwmake
+++ b/src/Allwmake
@@ -5,8 +5,8 @@ set -x
 # update OpenFOAM version strings if required
 wmakePrintBuild -check || /bin/rm -f OpenFOAM/Make/$WM_OPTIONS/global.? 2>/dev/null
 
-wmakeLnInclude -f OpenFOAM
-wmakeLnInclude -f OSspecific/$WM_OS
+wmakeLnInclude -f OpenFOAM -sf
+wmakeLnInclude -f OSspecific/$WM_OS -sf
 Pstream/Allwmake
 
 wmake libo  OSspecific/$WM_OS
diff --git a/src/turbulenceModels/LES/Allwmake b/src/turbulenceModels/LES/Allwmake
index a80c71ab57d28206f7585707735d49f8be229d95..d83439a9130c64ad25c955e5059ee79e1206c5d8 100755
--- a/src/turbulenceModels/LES/Allwmake
+++ b/src/turbulenceModels/LES/Allwmake
@@ -2,7 +2,7 @@
 cd ${0%/*} || exit 1    # run from this directory
 set -x
 
-wmakeLnInclude -f ../incompressible/LES
+wmakeLnInclude -f ../incompressible/LES -sf
 
 wmake libso LESfilters
 wmake libso LESdeltas