diff --git a/Lid_driven_cavity-3d/M/system/controlDict b/Lid_driven_cavity-3d/M/system/controlDict
index ee1f9bae7087adccc9316b4453055224e532dd78..f15765aac4b68ca03df1707218c04eb6ca1883ee 100644
--- a/Lid_driven_cavity-3d/M/system/controlDict
+++ b/Lid_driven_cavity-3d/M/system/controlDict
@@ -15,7 +15,7 @@ FoamFile
 }
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-//libs            (petscFoam);
+libs            (petscFoam);
 
 application     icoFoam;
 
diff --git a/Lid_driven_cavity-3d/S/system/controlDict b/Lid_driven_cavity-3d/S/system/controlDict
index 7a59c402d579e7a8082d6f3603c851d7bbc36cd0..ff5dc0b0006f2ddc0f602dba08bce658350352ba 100644
--- a/Lid_driven_cavity-3d/S/system/controlDict
+++ b/Lid_driven_cavity-3d/S/system/controlDict
@@ -15,7 +15,7 @@ FoamFile
 }
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-//libs            (petscFoam);
+libs            (petscFoam);
 
 application     icoFoam;
 
diff --git a/Lid_driven_cavity-3d/XL/system/controlDict b/Lid_driven_cavity-3d/XL/system/controlDict
index 1fe4d2896e2ad2320b2d59d060bcbd141e99e6b8..8e7850ba8d5b8cd708a7e3a8b3457152e98e3e67 100644
--- a/Lid_driven_cavity-3d/XL/system/controlDict
+++ b/Lid_driven_cavity-3d/XL/system/controlDict
@@ -15,7 +15,7 @@ FoamFile
 }
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-//libs            (petscFoam);
+libs            (petscFoam);
 
 application     icoFoam;
 
diff --git a/Lid_driven_cavity-3d/XXL/system/controlDict b/Lid_driven_cavity-3d/XXL/system/controlDict
index aafec7d7ac61fefe81402943d649ee64d5a61250..3374f40211b0eabafca4a50f84c63f84862cfb32 100644
--- a/Lid_driven_cavity-3d/XXL/system/controlDict
+++ b/Lid_driven_cavity-3d/XXL/system/controlDict
@@ -15,7 +15,7 @@ FoamFile
 }
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-libs            ("$FOAM_SITE_LIBBIN/libpetscFoam.so");
+libs            (petscFoam);
 
 application     icoFoam;