diff --git a/debian/settings/enable-ntp.sh b/debian/settings/enable-ntp.sh
index 229de08..4258c4c 100755
--- a/debian/settings/enable-ntp.sh
+++ b/debian/settings/enable-ntp.sh
@@ -34,7 +34,7 @@ choice() {
 check_deps_pkg() {
 for NAME in "${PKG_DEPS[@]}"
   do  
-    dpkg -l $NAME > /dev/null
+    dpkg -s $NAME > /dev/null
     CODE=$?
     if ! [ "$CODE" -ne 1 ]; then
       echo -ne "\nInstall $NAME ? "