diff --git a/src/calibre/devices/prs500/cli/main.py b/src/calibre/devices/prs500/cli/main.py
index 459f2d05e3..01685d3ac7 100755
--- a/src/calibre/devices/prs500/cli/main.py
+++ b/src/calibre/devices/prs500/cli/main.py
@@ -240,8 +240,10 @@ def main():
             print "Books in main memory:"
             for book in dev.books():
                 print book
-            print "\nBooks on storage card:"
-            for book in dev.books(oncard=True): print book
+            print "\nBooks on storage carda:"
+            for book in dev.books(oncard='carda'): print book
+            print "\nBooks on storage cardb:"
+            for book in dev.books(oncard='cardb'): print book
         elif command == "mkdir":
             parser = OptionParser(usage="usage: %prog mkdir [options] path\nCreate a directory on the device\n\npath must begin with / or card:/")
             if len(args) != 1: