diff --git a/src/app/application.cpp b/src/app/application.cpp
index 8fe47033e..da09211bd 100644
--- a/src/app/application.cpp
+++ b/src/app/application.cpp
@@ -575,6 +575,9 @@ void Application::runExternalProgram(const QString &programTemplate, const BitTo
             case u'L':
                 str.replace(i, 2, torrent->category());
                 break;
+            case u'M':
+                str.replace(i, 2, torrent->comment());
+                break;
             case u'N':
                 str.replace(i, 2, torrent->name());
                 break;
diff --git a/src/gui/optionsdialog.cpp b/src/gui/optionsdialog.cpp
index 114f3004f..84d98db7c 100644
--- a/src/gui/optionsdialog.cpp
+++ b/src/gui/optionsdialog.cpp
@@ -677,6 +677,7 @@ void OptionsDialog::loadDownloadsTabOptions()
             , tr("%I: Info hash v1 (or '-' if unavailable)")
             , tr("%J: Info hash v2 (or '-' if unavailable)")
             , tr("%K: Torrent ID (either sha-1 info hash for v1 torrent or truncated sha-256 info hash for v2/hybrid torrent)")
+            , tr("%M: Comment")
             , tr("Tip: Encapsulate parameter with quotation marks to avoid text being cut off at whitespace (e.g., \"%N\")"));
     m_ui->labelAutoRunParam->setText(autoRunStr);
 
diff --git a/src/webui/www/private/views/preferences.html b/src/webui/www/private/views/preferences.html
index a4cf7e5ae..f6f2e97d4 100644
--- a/src/webui/www/private/views/preferences.html
+++ b/src/webui/www/private/views/preferences.html
@@ -385,6 +385,7 @@
                 <li>QBT_TR(%I: Info hash v1)QBT_TR[CONTEXT=OptionsDialog]</li>
                 <li>QBT_TR(%J: Info hash v2)QBT_TR[CONTEXT=OptionsDialog]</li>
                 <li>QBT_TR(%K: Torrent ID)QBT_TR[CONTEXT=OptionsDialog]</li>
+                <li>QBT_TR(%M: Comment)QBT_TR[CONTEXT=OptionsDialog]</li>
             </ul>
             QBT_TR(Tip: Encapsulate parameter with quotation marks to avoid text being cut off at whitespace (e.g., "%N"))QBT_TR[CONTEXT=OptionsDialog]
         </div>