diff --git a/include/aspect/boundary_traction/interface.h b/include/aspect/boundary_traction/interface.h
index ed9bcd8c460..9cf00fb379e 100644
--- a/include/aspect/boundary_traction/interface.h
+++ b/include/aspect/boundary_traction/interface.h
@@ -143,7 +143,7 @@ namespace aspect
          * The list of plugin objects can be
          * requested by calling get_active_plugins() and the
          * list of boundaries they are responsible for is
-         * returnd by get_active_plugin_boundary_indicators().
+         * returned by get_active_plugin_boundary_indicators().
          */
         ComponentMask
         get_component_mask(const types::boundary_id boundary_id) const;
diff --git a/include/aspect/boundary_velocity/interface.h b/include/aspect/boundary_velocity/interface.h
index 9d38f415487..88cf733f0e9 100644
--- a/include/aspect/boundary_velocity/interface.h
+++ b/include/aspect/boundary_velocity/interface.h
@@ -168,7 +168,7 @@ namespace aspect
          * The list of plugin objects can be
          * requested by calling get_active_plugins() and the
          * list of boundaries they are responsible for is
-         * returnd by get_active_plugin_boundary_indicators().
+         * returned by get_active_plugin_boundary_indicators().
          */
         ComponentMask
         get_component_mask(const types::boundary_id boundary_id) const;