diff --git a/src/gam/gapi/cbcm.py b/src/gam/gapi/cbcm.py
index 95ead15d..2be5dbf8 100644
--- a/src/gam/gapi/cbcm.py
+++ b/src/gam/gapi/cbcm.py
@@ -230,7 +230,7 @@ def revoketoken():
 def printshowtokens(csvFormat):
     cbcm = build()
     query = None
-    fields = []
+    fields = None
     if csvFormat:
         titles = ['token']
         csv_rows = []