diff --git a/library/CMakeLists.txt b/library/CMakeLists.txt
index 65dd10da0..db2d9ca45 100644
--- a/library/CMakeLists.txt
+++ b/library/CMakeLists.txt
@@ -266,6 +266,7 @@ ADD_CUSTOM_COMMAND(
         ${CMAKE_CURRENT_SOURCE_DIR}/xml
         ${CMAKE_CURRENT_SOURCE_DIR}/include/df
     MAIN_DEPENDENCY ${dfapi_SOURCE_DIR}/xml/codegen.pl
+    COMMENT "Generating codegen.out.xml and df/headers"
     DEPENDS ${GENERATE_INPUT_XMLS} ${GENERATE_INPUT_SCRIPTS}
 )