diff --git a/app/src/main/assets/all/scripts/addon.d.sh b/app/src/main/assets/all/scripts/addon.d.sh
new file mode 100644
index 0000000..f495448
--- /dev/null
+++ b/app/src/main/assets/all/scripts/addon.d.sh
@@ -0,0 +1,62 @@
+#!/sbin/sh
+#
+# /system/addon.d/99-busybox.sh
+# Backup and restore busybox
+#
+
+. /tmp/backuptool.functions
+
+do_action() {
+  action="$1"
+  bb_install=$(cat "$2")
+  bb="$bb_install/busybox"
+
+  [ -z "$bb_install" ] && exit 1
+
+  if [ "$action" = "backup" ]; then
+    local_bb="$bb"
+    [ ! -f "$local_bb" ] && exit 1
+    backup_file "$bb"
+    backup_file "$bb_install/ssl_helper"
+    echo "$bb_install" > /tmp/busybox-install-dir
+  elif [ "$action" = "restore" ]; then
+    local_bb="$C/$bb"
+    [ ! -f "$local_bb" ] && exit 1
+    restore_file "$bb"
+    restore_file "$bb_install/ssl_helper"
+  fi
+
+  "$local_bb" --list | while read applet; do
+    file="$bb_install/$applet"
+
+    if [ "$action" = "backup" ]; then
+      link=$(readlink -f "$file")
+      [ -f "$file" -a "$link" = "$bb" ] && backup_file "$file"
+    elif [ "$action" = "restore" ]; then
+      [ -f "$C/$file" ] && restore_file "$file"
+    fi
+  done
+}
+
+case "$1" in
+  backup)
+    do_action backup "$S/addon.d/busybox-install-dir"
+  ;;
+
+  restore)
+    do_action restore "/tmp/busybox-install-dir"
+  ;;
+
+  pre-backup)
+    # Stub
+  ;;
+  post-backup)
+    # Stub
+  ;;
+  pre-restore)
+    # Stub
+  ;;
+  post-restore)
+    # Stub
+  ;;
+esac
diff --git a/app/src/main/assets/all/scripts/info.sh b/app/src/main/assets/all/scripts/info.sh
index 2f0b58e..08b2e77 100644
--- a/app/src/main/assets/all/scripts/info.sh
+++ b/app/src/main/assets/all/scripts/info.sh
@@ -16,6 +16,14 @@ busybox printf "* /data: $DATA_FREE\n"
 SYSTEM_FREE=$(busybox df -Ph /system | busybox grep -v ^Filesystem | busybox awk '{print $4}')
 busybox printf "* /system: $SYSTEM_FREE\n"
 
+busybox printf "\naddon.d support:\n"
+if busybox test -d /system/addon.d
+then
+    busybox printf "* available\n"
+else
+    busybox printf "* unavailable\n"
+fi
+
 busybox printf "\nLatest BusyBox:\n"
 BB_BIN=$(busybox which busybox)
 BB_VERSION=$(busybox | busybox head -1 | busybox awk '{print $2}')
@@ -53,6 +61,16 @@ then
     busybox printf "* size: $BB_SIZE bytes\n"
     BB_MD5=$(busybox md5sum $BB_BIN | busybox awk '{print $1}')
     busybox printf "* md5: $BB_MD5\n"
+
+    if test -d /system/addon.d
+    then
+        if test -f /system/addon.d/99-busybox.sh
+        then
+            busybox printf "* addon.d script: found\n"
+        else
+            busybox printf "* addon.d script: not found\n"
+        fi
+    fi
 else
     busybox printf "* not installed\n"
 fi
diff --git a/app/src/main/assets/all/scripts/install.sh b/app/src/main/assets/all/scripts/install.sh
index b22871f..fbd2c94 100644
--- a/app/src/main/assets/all/scripts/install.sh
+++ b/app/src/main/assets/all/scripts/install.sh
@@ -44,6 +44,16 @@ do
     fi
 done
 
+if busybox test "$SYSTEM_REMOUNT" -ne 0 -a -d /system/addon.d
+then
+    busybox cp "$ENV_DIR/scripts/addon.d.sh" /system/addon.d/99-busybox.sh
+    echo "$INSTALL_DIR" > /system/addon.d/busybox-install-dir
+
+    busybox chown 0:0 /system/addon.d/99-busybox.sh
+    busybox chmod 755 /system/addon.d/99-busybox.sh
+    busybox chmod 644 /system/addon.d/busybox-install-dir
+fi
+
 if busybox test "$REPLACE_APPLETS" = "true"
 then
     busybox printf "Removing old applets ... "
diff --git a/app/src/main/assets/all/scripts/recovery.sh b/app/src/main/assets/all/scripts/recovery.sh
index a6fb382..1b75a44 100644
--- a/app/src/main/assets/all/scripts/recovery.sh
+++ b/app/src/main/assets/all/scripts/recovery.sh
@@ -35,6 +35,12 @@ do
     chmod 755 $INSTALL_DIR/$fn
 done
 $INSTALL_DIR/busybox --install -s $INSTALL_DIR
+if [ -d /system/addon.d ]; then
+    cp addon.d.sh /system/addon.d/99-busybox.sh
+    chmod 755 /system/addon.d/99-busybox.sh
+    echo "$INSTALL_DIR" > /system/addon.d/busybox-install-dir
+    chmod 644 /system/addon.d/busybox-install-dir
+fi
 ui_print "Unmounting /system part..."
 umount /system
 exit 0
diff --git a/app/src/main/assets/all/scripts/remove.sh b/app/src/main/assets/all/scripts/remove.sh
index ae10052..88e2502 100644
--- a/app/src/main/assets/all/scripts/remove.sh
+++ b/app/src/main/assets/all/scripts/remove.sh
@@ -52,6 +52,21 @@ else
     busybox printf "... path not found.\n"
 fi
 
+busybox printf "Removing addon.d script ... "
+if busybox test -e /system/addon.d/99-busybox.sh
+then
+    busybox rm /system/addon.d/busybox-install-dir
+    busybox rm /system/addon.d/99-busybox.sh
+    if busybox test $? -eq 0
+    then
+        busybox printf "done\n"
+    else
+        busybox printf "fail\n"
+    fi
+else
+    busybox printf "not found\n"
+fi
+
 if busybox test "$SYSTEM_REMOUNT" -ne 0
 then
     busybox printf 'Remounting /system to ro ... '
diff --git a/app/src/main/java/ru/meefik/busybox/EnvUtils.java b/app/src/main/java/ru/meefik/busybox/EnvUtils.java
index f6adee9..8ed3d3e 100644
--- a/app/src/main/java/ru/meefik/busybox/EnvUtils.java
+++ b/app/src/main/java/ru/meefik/busybox/EnvUtils.java
@@ -413,6 +413,10 @@ static boolean makeZipArchive(Context c, String archiveName) {
             File updateBinary = new File(PrefStore.getEnvDir(c) + "/scripts/recovery.sh");
             zip.putNextEntry(new ZipEntry("META-INF/com/google/android/update-binary"));
             addFileToZip(updateBinary, zip);
+            File addondBinary = new File(PrefStore.getEnvDir(c) + "/scripts/addon.d.sh");
+            zip.putNextEntry(new ZipEntry("addon.d.sh"));
+            addFileToZip(addondBinary, zip);
+
             result = true;
         } catch (IOException e) {
             e.printStackTrace();
diff --git a/app/src/main/java/ru/meefik/busybox/ExecScript.java b/app/src/main/java/ru/meefik/busybox/ExecScript.java
index ebca338..6dbef5a 100644
--- a/app/src/main/java/ru/meefik/busybox/ExecScript.java
+++ b/app/src/main/java/ru/meefik/busybox/ExecScript.java
@@ -32,6 +32,7 @@ private void install() {
         if (!EnvUtils.isRooted(context)) return;
         String envDir = PrefStore.getEnvDir(context);
         List<String> params = new ArrayList<>();
+        params.add("ENV_DIR=" + envDir);
         params.add("INSTALL_DIR=" + PrefStore.getInstallDir(context));
         params.add("INSTALL_APPLETS=" + PrefStore.isInstallApplets(context));
         params.add("REPLACE_APPLETS=" + PrefStore.isReplaceApplets(context));