diff --git a/nbd/nbd-package/DEBIAN/postinst b/nbd/nbd-package/DEBIAN/postinst
index 6e850536ea..647feb490f 100755
--- a/nbd/nbd-package/DEBIAN/postinst
+++ b/nbd/nbd-package/DEBIAN/postinst
@@ -6,4 +6,12 @@ chmod +x /usr/bin/map_curve_disk.sh
 cp /usr/bin/map_curve_disk.sh /etc/init.d
 update-rc.d map_curve_disk.sh defaults
 
+CURVETAB=/etc/curve/curvetab
+CURVETABBAK=/etc/curve/curvetab-bak
+
+if [ -f ${CURVETABBAK} ]; then
+    cp -f -p ${CURVETABBAK} ${CURVETAB}
+    rm -f ${CURVETABBAK}
+fi
+
 exit 0
diff --git a/nbd/nbd-package/DEBIAN/preinst b/nbd/nbd-package/DEBIAN/preinst
new file mode 100755
index 0000000000..feb17bf74e
--- /dev/null
+++ b/nbd/nbd-package/DEBIAN/preinst
@@ -0,0 +1,12 @@
+#!/bin/bash
+
+set -e
+
+CURVETAB=/etc/curve/curvetab
+CURVETABBAK=/etc/curve/curvetab-bak
+
+if [ -f ${CURVETAB} ]; then
+    cp -f -p ${CURVETAB} ${CURVETABBAK}
+fi
+
+exit 0