diff --git a/doc/qutebrowser.1.asciidoc b/doc/qutebrowser.1.asciidoc
index 989fbd3cd..d76c4480c 100644
--- a/doc/qutebrowser.1.asciidoc
+++ b/doc/qutebrowser.1.asciidoc
@@ -102,8 +102,8 @@ show it.
 *--no-err-windows*::
     Don't show any error windows (used for tests/smoke.py).
 
-*--qt-arg* 'QT_ARG'::
-    Pass an argument with a value to Qt.
+*--qt-arg* 'NAME' 'VALUE'::
+    Pass an argument with a value to Qt. For example, you can do `--qt-arg geometry 650x555+200+300` to set the window geometry.
 
 *--qt-flag* 'QT_FLAG'::
     Pass an argument to Qt as flag.
diff --git a/qutebrowser/qutebrowser.py b/qutebrowser/qutebrowser.py
index 420a07d0c..8665d4592 100644
--- a/qutebrowser/qutebrowser.py
+++ b/qutebrowser/qutebrowser.py
@@ -105,8 +105,10 @@ def get_argparser():
                        "temporary basedir.")
     debug.add_argument('--no-err-windows', action='store_true', help="Don't "
                        "show any error windows (used for tests/smoke.py).")
-    debug.add_argument('--qt-arg', help="Pass an argument with a value to Qt.",
-                       nargs=2)
+    debug.add_argument('--qt-arg', help="Pass an argument with a value to Qt. "
+                       "For example, you can do "
+                       "`--qt-arg geometry 650x555+200+300` to set the window "
+                       "geometry.", nargs=2, metavar=('NAME', 'VALUE'))
     debug.add_argument('--qt-flag', help="Pass an argument to Qt as flag.",
                        nargs=1)
     parser.add_argument('command', nargs='*', help="Commands to execute on "