diff --git a/src/calibre/devices/usbms/device.py b/src/calibre/devices/usbms/device.py
index 128bc58ec5..0c189da63b 100644
--- a/src/calibre/devices/usbms/device.py
+++ b/src/calibre/devices/usbms/device.py
@@ -178,7 +178,7 @@ class Device(_Device):
         for drive in c.Win32_DiskDrive():
             if self.windows_match_device(str(drive.PNPDeviceID), WINDOWS_MAIN_MEM):
                 drives['main'] = self.windows_get_drive_prefix(drive)
-            else if self.windows_match_device(str(drive.PNPDeviceID), WINDOWS_CARD_MEM):
+            elif self.windows_match_device(str(drive.PNPDeviceID), WINDOWS_CARD_MEM):
                 drives['card'] = self.windows_get_drive_prefix(drive)
                 
             if 'main' and 'card' in drives.keys():