diff --git a/control/command.go b/control/command.go
index 9b490203..dd1793e3 100644
--- a/control/command.go
+++ b/control/command.go
@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+// Package control controls the database agents and benchmark testers.
 package control
 
 import (