diff --git a/CoreModules/generic/preconf.sh b/CoreModules/generic/preconf.sh
index ec5f97e..33983d7 100644
--- a/CoreModules/generic/preconf.sh
+++ b/CoreModules/generic/preconf.sh
@@ -45,8 +45,8 @@ else
     swapon /swapfile
     echo '/swapfile swap swap defaults 0 0' >> /etc/fstab
 fi
-sed -i 's/#/vm.swappiness=10/g' /etc/sysctl.conf
-sed -i 's/#/vm.vfs_cache_pressure=50/g' /etc/sysctl.conf
+echo "vm.swappiness=10" >> /etc/sysctl.conf
+echo "vm.vfs_cache_pressure=50" >> /etc/sysctl.conf
 
 
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