diff --git a/src/Interpreters/MutationsInterpreter.cpp b/src/Interpreters/MutationsInterpreter.cpp
index 78ac8dc656b..03a2a4da1d1 100644
--- a/src/Interpreters/MutationsInterpreter.cpp
+++ b/src/Interpreters/MutationsInterpreter.cpp
@@ -424,7 +424,6 @@ ASTPtr MutationsInterpreter::prepare(bool dry_run)
         validateUpdateColumns(storage, metadata_snapshot, updated_columns, column_to_affected_materialized);
     }
 
-    /// Columns, that we need to read for calculation of skip indices, projections or TTL expressions.
     dependencies = getAllColumnDependencies(metadata_snapshot, updated_columns);
 
     /// First, break a sequence of commands into stages.
diff --git a/src/Interpreters/MutationsInterpreter.h b/src/Interpreters/MutationsInterpreter.h
index c9d66b4f13b..65ad027118a 100644
--- a/src/Interpreters/MutationsInterpreter.h
+++ b/src/Interpreters/MutationsInterpreter.h
@@ -151,6 +151,7 @@ private:
 
     MutationKind mutation_kind; /// Do we meet any index or projection mutation.
 
+    /// Columns, that we need to read for calculation of skip indices, projections or TTL expressions.
     ColumnDependencies dependencies;
 };