diff --git a/src/calibre/devices/android/driver.py b/src/calibre/devices/android/driver.py
index efe979158d..9ae6f4ab9c 100644
--- a/src/calibre/devices/android/driver.py
+++ b/src/calibre/devices/android/driver.py
@@ -187,10 +187,10 @@ class ANDROID(USBMS):
     EBOOK_DIR_MAIN = ['eBooks/import', 'wordplayer/calibretransfer', 'Books',
             'sdcard/ebooks']
     EXTRA_CUSTOMIZATION_MESSAGE = [_('Comma separated list of directories to '
-            'send e-books to on the device\'s main memory. The first one that exists will '
+            'send e-books to on the device\'s <b>main memory</b>. The first one that exists will '
             'be used'),
             _('Comma separated list of directories to '
-            'send e-books to on the device\'s storage cards. The first one that exists will '
+            'send e-books to on the device\'s <b>storage cards</b>. The first one that exists will '
             'be used')
             ]