diff --git a/packages/types-android/src/lib/android/android-declarations.d.ts b/packages/types-android/src/lib/android/android-declarations.d.ts
index f49e25a4a..ed453876f 100644
--- a/packages/types-android/src/lib/android/android-declarations.d.ts
+++ b/packages/types-android/src/lib/android/android-declarations.d.ts
@@ -8,6 +8,12 @@ declare function long(num: number): any;
  */
 declare var gc: () => void;
 
+
+/**
+ * Returns the version of the runtime.
+ */
+declare function __runtimeVersion: string;
+
 /**
  * Releases the reference to the wrapped native object
  * @param object The Java object to release.
diff --git a/packages/types-ios/src/lib/ios/runtime.d.ts b/packages/types-ios/src/lib/ios/runtime.d.ts
index 18d517e06..bae3404e8 100644
--- a/packages/types-ios/src/lib/ios/runtime.d.ts
+++ b/packages/types-ios/src/lib/ios/runtime.d.ts
@@ -1,5 +1,12 @@
 /// <reference path="interop.d.ts" />
 
+
+
+/**
+ * Returns the version of the runtime.
+ */
+declare function __runtimeVersion: string;
+
 /**
  * Triggers garbage collection in JavaScript
  */