diff --git a/mobile/android/base/sync/jpake/JPakeCrypto.java b/mobile/android/base/sync/jpake/JPakeCrypto.java
index 025bfd21bbb..0c13af7c541 100644
--- a/mobile/android/base/sync/jpake/JPakeCrypto.java
+++ b/mobile/android/base/sync/jpake/JPakeCrypto.java
@@ -138,7 +138,7 @@ public class JPakeCrypto {
 
     Log.d(LOG_TAG, "round2 started.");
 
-    if (jp.gx4 == BigInteger.ONE) {
+    if (BigInteger.ONE.compareTo(jp.gx4) == 0) {
       throw new Gx4IsOneException();
     }