diff --git a/scripts/rpc.py b/scripts/rpc.py
index 8bea468c9..f5c419597 100755
--- a/scripts/rpc.py
+++ b/scripts/rpc.py
@@ -1345,7 +1345,7 @@ Format: 'user:u1 secret:s1 muser:mu1 msecret:ms1,user:u2 secret:s2 muser:mu2 mse
     *** The Portal/Initiator Groups must be precreated ***""")
     p.add_argument('queue_depth', help='Desired target queue depth', type=int)
     p.add_argument('-g', '--chap-group', help="""Authentication group ID for this target node.
-    *** Authentication group must be precreated ***""", type=int, default=0)
+    *** Authentication group must be precreated ***""", type=int)
     p.add_argument('-d', '--disable-chap', help="""CHAP authentication should be disabled for this target node.
     *** Mutually exclusive with --require-chap ***""", action='store_true')
     p.add_argument('-r', '--require-chap', help="""CHAP authentication should be required for this target node.
@@ -1387,7 +1387,7 @@ Format: 'user:u1 secret:s1 muser:mu1 msecret:ms1,user:u2 secret:s2 muser:mu2 mse
                               help='Set CHAP authentication for the target node')
     p.add_argument('name', help='Target node name (ASCII)')
     p.add_argument('-g', '--chap-group', help="""Authentication group ID for this target node.
-    *** Authentication group must be precreated ***""", type=int, default=0)
+    *** Authentication group must be precreated ***""", type=int)
     p.add_argument('-d', '--disable-chap', help="""CHAP authentication should be disabled for this target node.
     *** Mutually exclusive with --require-chap ***""", action='store_true')
     p.add_argument('-r', '--require-chap', help="""CHAP authentication should be required for this target node.
@@ -1628,7 +1628,7 @@ Format: 'user:u1 secret:s1 muser:mu1 msecret:ms1,user:u2 secret:s2 muser:mu2 mse
                               help='Set CHAP authentication for discovery sessions specific for the portal group')
     p.add_argument('tag', help='Portal group tag (unique, integer > 0)', type=int)
     p.add_argument('-g', '--chap-group', help="""Authentication group ID for this portal group.
-    *** Authentication group must be precreated ***""", type=int, default=0)
+    *** Authentication group must be precreated ***""", type=int)
     p.add_argument('-d', '--disable-chap', help="""CHAP authentication should be disabled for this portal group.
     *** Mutually exclusive with --require-chap ***""", action='store_true')
     p.add_argument('-r', '--require-chap', help="""CHAP authentication should be required for this portal group.