diff --git a/include/connection.h b/include/connection.h
index 1f451a3913db33ccccefbaf07ed368b4273595ab..5e3909596e65038f9f4cd5a69c7a658d981babf1 100644
--- a/include/connection.h
+++ b/include/connection.h
@@ -38,12 +38,12 @@
 #include "caosdb/info/v1alpha1/main.grpc.pb.h"
 namespace grpc {
 class ChannelCredentials;
-}
+} // namespace grpc
 namespace caosdb {
 namespace info {
 namespace v1alpha1 {
 class VersionInfo;
-}
+} // namespace v1alpha1
 } // namespace info
 } // namespace caosdb