diff --git a/ios/engine/KMEI/KeymanEngine/Classes/Constants.swift b/ios/engine/KMEI/KeymanEngine/Classes/Constants.swift
index 200d053541..fa1e0011fe 100644
--- a/ios/engine/KMEI/KeymanEngine/Classes/Constants.swift
+++ b/ios/engine/KMEI/KeymanEngine/Classes/Constants.swift
@@ -19,6 +19,7 @@ public enum Key {
   static let engineVersion = "KeymanEngineVersion"
   static let keyboardPickerDisplayed = "KeyboardPickerDisplayed"
   static let synchronizeSWKeyboard = "KeymanSynchronizeSWKeyboard"
+  static let migrationLevel = "KeymanEngineMigrationLevel"
 
   // JSON keys for language REST calls
   static let options = "options"
diff --git a/ios/engine/KMEI/KeymanEngine/Classes/Extension/UserDefaults+Types.swift b/ios/engine/KMEI/KeymanEngine/Classes/Extension/UserDefaults+Types.swift
index 21682a9de2..d5f7e5554d 100644
--- a/ios/engine/KMEI/KeymanEngine/Classes/Extension/UserDefaults+Types.swift
+++ b/ios/engine/KMEI/KeymanEngine/Classes/Extension/UserDefaults+Types.swift
@@ -84,4 +84,14 @@ public extension UserDefaults {
   public func userKeyboard(withID keyboardID: String, languageID: String) -> InstallableKeyboard? {
     return userKeyboards?.first { $0.id == keyboardID && $0.languageID == languageID }
   }
+
+  var migrationLevel: Int {
+    get {
+      return integer(forKey: Key.migrationLevel)
+    }
+
+    set(level) {
+      set(level, forKey: Key.migrationLevel)
+    }
+  }
 }
diff --git a/ios/engine/KMEI/KeymanEngine/Classes/Migrations.swift b/ios/engine/KMEI/KeymanEngine/Classes/Migrations.swift
index fdb4e3a893..2417da3cdd 100644
--- a/ios/engine/KMEI/KeymanEngine/Classes/Migrations.swift
+++ b/ios/engine/KMEI/KeymanEngine/Classes/Migrations.swift
@@ -8,8 +8,17 @@
 
 import Foundation
 
+fileprivate enum MigrationLevel {
+  static let initial = 0
+  static let migratedForKMP = 10
+}
+
 enum Migrations {
   static func migrateForKMP(storage: Storage) {
+    guard storage.userDefaults.migrationLevel < MigrationLevel.migratedForKMP else {
+      return
+    }
+
     let languageDir = storage.baseDir.appendingPathComponent("languages")
     let fontDir = storage.baseDir.appendingPathComponent("fonts")
 
@@ -80,6 +89,8 @@ enum Migrations {
     // Remove keyboards that were not copied successfully
     let filteredUserKeyboards = userKeyboards.filter { successfulKeyboards.contains($0.id) }
     storage.userDefaults.userKeyboards = filteredUserKeyboards
+    storage.userDefaults.migrationLevel = MigrationLevel.migratedForKMP
+    storage.userDefaults.synchronize()
 
     // TODO: Remove old directory
   }