diff --git a/ReactAndroid/src/main/java/com/facebook/yoga/YogaJNI.java b/ReactAndroid/src/main/java/com/facebook/yoga/YogaJNI.java
index 6e036c4a7..deccbcf5d 100644
--- a/ReactAndroid/src/main/java/com/facebook/yoga/YogaJNI.java
+++ b/ReactAndroid/src/main/java/com/facebook/yoga/YogaJNI.java
@@ -10,6 +10,10 @@ package com.facebook.yoga;
 import com.facebook.soloader.SoLoader;
 
 public class YogaJNI {
+
+  // Known constants. 1-3 used in previous experiments. Do not reuse.
+  public static int JNI_FAST_CALLS = 4;
+
   // set before loading any other Yoga code
   public static boolean useFastCall = false;