diff --git a/scripts/intfstat b/scripts/intfstat
index 0bf9a4712e70..a1e9c682588f 100755
--- a/scripts/intfstat
+++ b/scripts/intfstat
@@ -162,7 +162,7 @@ class Intfstat(object):
                         ns_prate(cntr.tx_p_ok, old_cntr.tx_p_ok, time_gap),
                         ns_diff(cntr.tx_p_err, old_cntr.tx_p_err)))
         if use_json:
-            print self.table_as_json(table, header)
+            print table_as_json(table, header)
         else:
             print tabulate(table, header, tablefmt='simple', stralign='right')
 
diff --git a/scripts/portstat b/scripts/portstat
index 3ba57caa5416..be5cbbed25b4 100755
--- a/scripts/portstat
+++ b/scripts/portstat
@@ -184,7 +184,7 @@ class Portstat(object):
                               ns_diff(cntr.tx_ovr, old_cntr.tx_ovr)))
 
         if use_json:
-            print self.table_as_json(table, print_all)
+            print table_as_json(table, header)
         else:
             if print_all:
                 print tabulate(table, header_all, tablefmt='simple', stralign='right')