diff --git a/android/src/main/java/org/wonday/orientation/OrientationModule.java b/android/src/main/java/org/wonday/orientation/OrientationModule.java
index 35041fd..7788847 100644
--- a/android/src/main/java/org/wonday/orientation/OrientationModule.java
+++ b/android/src/main/java/org/wonday/orientation/OrientationModule.java
@@ -172,7 +172,7 @@ public void getDeviceOrientation(Callback callback) {
     public void lockToPortrait() {
         final Activity activity = getCurrentActivity();
         if (activity == null) return;
-        activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
+        activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
         isLocked = true;
 
         // force send an UI orientation event