diff --git a/core/java/android/provider/Settings.java b/core/java/android/provider/Settings.java
index 6ed1ac8df3739..bf6003e20ca41 100644
--- a/core/java/android/provider/Settings.java
+++ b/core/java/android/provider/Settings.java
@@ -2691,6 +2691,12 @@ public final class Settings {
          */
         public static final String GMAIL_NUM_RETRY_UPHILL_OP = "gmail_discard_error_uphill_op";
 
+        /**
+         * Controls if the protocol buffer version of the protocol will use a multipart request for
+         * attachment uploads. Value must be an integer where non-zero means true. Defaults to 0.
+         */
+        public static final String GMAIL_USE_MULTIPART_PROTOBUF = "gmail_use_multipart_protobuf";
+
         /**
          * the transcoder URL for mobile devices.
          */