diff --git a/proto/src/metrics_constants.proto b/proto/src/metrics_constants.proto
index 5319086..6167d85 100644
--- a/proto/src/metrics_constants.proto
+++ b/proto/src/metrics_constants.proto
@@ -4252,6 +4252,11 @@
     // OS: O MR
     FIELD_RANKED_POSITION = 1087;
 
+    // OPEN: Settings > Data plan usage
+    // CATEGORY: SETTINGS
+    // OS: O MR
+    DATA_PLAN_USAGE_SUMMARY = 1088;
+
     // Add new aosp constants above this line.
     // END OF AOSP CONSTANTS
   }