diff --git a/src/calibre/devices/eb600/driver.py b/src/calibre/devices/eb600/driver.py
index 49a648f3ac..e733d8d8d2 100644
--- a/src/calibre/devices/eb600/driver.py
+++ b/src/calibre/devices/eb600/driver.py
@@ -97,7 +97,7 @@ class POCKETBOOK360(EB600):
 
     VENDOR_NAME = ['PHILIPS', '__POCKET', 'POCKETBO']
     WINDOWS_MAIN_MEM = WINDOWS_CARD_A_MEM = ['MASS_STORGE', 'BOOK_USB_STORAGE',
-            'POCKET_611_61']
+            'OK_POCKET_611_61']
 
     OSX_MAIN_MEM = OSX_CARD_A_MEM = 'Philips Mass Storge Media'
     OSX_MAIN_MEM_VOL_PAT = re.compile(r'/Pocket')