diff --git a/cmake/PugsDoc.cmake b/cmake/PugsDoc.cmake
index 827faed475046f98d12bc5731e61a67ee9f2af59..e6fe806ab4e3d0a2329281fb140902d49b70b659 100644
--- a/cmake/PugsDoc.cmake
+++ b/cmake/PugsDoc.cmake
@@ -25,6 +25,7 @@ if (EMACS)
   )
 
   add_custom_command(
+    COMMENT "Check Emacs packages for documentation building"
     OUTPUT "${PUGS_SOURCE_DIR}/doc/elpa"
     COMMAND
     ${CMAKE_COMMAND} -E env