diff --git a/defaults/main.yml b/defaults/main.yml
index ddce90f..c07ce9b 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -55,7 +55,6 @@ walle_envs_user_deletion:
 # walle_galaxy_url: #galaxy_hostname, no leading slash
 # walle_tool: <string to filter tool ids in database job table>
 walle_verbose: false
-walle_debug: false
 walle_kill: false
 
 # Cron
diff --git a/files/walle.py b/files/walle.py
index 9c3c809..7619279 100644
--- a/files/walle.py
+++ b/files/walle.py
@@ -202,12 +202,6 @@ def make_parser() -> argparse.ArgumentParser:
     my_parser.add_argument(
         "-v", "--verbose", action="store_true", help="Report details for every match."
     )
-    my_parser.add_argument(
-        "-d",
-        "--debug",
-        action="store_true",
-        help="Emit additional log messages for debugging Wall-E.",
-    )
     my_parser.add_argument(
         "-i",
         "--interactive",
diff --git a/tasks/main.yml b/tasks/main.yml
index e9a73b0..7e13ecd 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -98,7 +98,6 @@
       {% if walle_filesize_max %} --max-size {{ walle_filesize_max }} {% endif %}
       {% if walle_since_hours %} --since {{ walle_since_hours }} {% endif %}
       {% if walle_verbose %} --verbose {% endif %}
-      {% if walle_debug %} --debug {% endif %}
       {% if walle_delete_users %} --delete-user {{ walle_delete_threshold }}
       {% endif %}
       {% if walle_kill %} --kill {% endif %}