diff --git a/src/calibre/gui2/viewer/web_view.py b/src/calibre/gui2/viewer/web_view.py
index bfdb267850..ab02c8130b 100644
--- a/src/calibre/gui2/viewer/web_view.py
+++ b/src/calibre/gui2/viewer/web_view.py
@@ -174,6 +174,7 @@ def create_profile():
         ans.setHttpUserAgent(ua)
         if is_running_from_develop:
             from calibre.utils.rapydscript import compile_viewer
+            print('Compiling viewer code...')
             compile_viewer()
         js = P('viewer.js', data=True, allow_user_override=False)
         translations_json = get_translations_data() or b'null'