diff --git a/protect/control/v1/common.proto b/protect/control/v1/common.proto
index 9ad5866..0a409ab 100644
--- a/protect/control/v1/common.proto
+++ b/protect/control/v1/common.proto
@@ -345,8 +345,14 @@ message ZoneExitStatus {
   int32 code = 1;
 }
 
+enum ZoneErrorReason {
+  ZONE_ERROR_REASON_UNKNOWN = 0;
+  ZONE_ERROR_REASON_INSUFFICIENT_MEMORY = 1;
+}
+
 message ZoneErrorStatus {
   string message = 1;
+  ZoneErrorReason reason = 2;
 }
 
 message ZoneResourceStatus {