diff --git a/protect/control/v1/common.proto b/protect/control/v1/common.proto
index c213140..a420294 100644
--- a/protect/control/v1/common.proto
+++ b/protect/control/v1/common.proto
@@ -133,6 +133,7 @@ message ProcessSpec {
   bool stdout = 9;
   bool stderr = 10;
   reserved 11, 12;
+  repeated int64 additional_gids = 13;
 }
 
 message MountSpec {