diff --git a/entrypoint-ubuntu.sh b/entrypoint-ubuntu.sh
index c7aaa83..2530506 100644
--- a/entrypoint-ubuntu.sh
+++ b/entrypoint-ubuntu.sh
@@ -42,13 +42,13 @@ Verbosity = 5
 EOC
 
 cat > /etc/default/nfs-common << EOC
-NEED_STATD=y
+NEED_STATD=yes
 
 # Do you want to start the idmapd daemon? It is only needed for NFSv4.
-NEED_IDMAPD=y
+NEED_IDMAPD=yes
 
 # Do you want to start the gssd daemon? It is required for Kerberos mounts.
-NEED_GSSD=y
+NEED_GSSD=yes
 EOC
 
 echo NEED_SVCGSSD=y > /etc/default/nfs-kernel-server