diff --git a/y2017/control_loops/superstructure/column/column.cc b/y2017/control_loops/superstructure/column/column.cc
index b2e7c5c..f1aea39 100644
--- a/y2017/control_loops/superstructure/column/column.cc
+++ b/y2017/control_loops/superstructure/column/column.cc
@@ -437,6 +437,7 @@
       state_ = State::ZEROING_UNINITIALIZED;
 
       // Fall through so we can start the zeroing process immediately.
+      [[fallthrough]];
 
     case State::ZEROING_UNINITIALIZED:
       // Set up the profile to be the zeroing profile.