diff --git a/src/calibre/devices/__init__.py b/src/calibre/devices/__init__.py
index 24e606e022..1918a36cc8 100644
--- a/src/calibre/devices/__init__.py
+++ b/src/calibre/devices/__init__.py
@@ -56,6 +56,7 @@ def get_connected_device():
     return dev
 
 def debug(ioreg_to_tmp=False, buf=None):
+    import textwrap
     from calibre.customize.ui import device_plugins
     from calibre.devices.scanner import DeviceScanner, win_pnp_drives
     from calibre.constants import iswindows, isosx, __version__
@@ -97,8 +98,8 @@ def debug(ioreg_to_tmp=False, buf=None):
         connected_devices = []
         devplugins = list(sorted(device_plugins(), cmp=lambda
                 x,y:cmp(x.__class__.__name__, y.__class__.__name__)))
-        out('Available plugins:', ' '.join([x.__class__.__name__ for x in
-            devplugins]))
+        out('Available plugins:', textwrap.fill(' '.join([x.__class__.__name__ for x in
+            devplugins])))
         out(' ')
         out('Looking for devices...')
         for dev in devplugins: