diff --git a/stx/lib/stx/stx_build.py b/stx/lib/stx/stx_build.py
index 345ac410..05d2a5b3 100644
--- a/stx/lib/stx/stx_build.py
+++ b/stx/lib/stx/stx_build.py
@@ -32,7 +32,7 @@ class HandleBuildTask:
     def buildImageCMD(self, args, prefixcmd):
 
         if args.type:
-            if (args.type != 'rt' and args.type != 'std'):
+            if args.type not in ['rt', 'std']:
                 self.logger.error('Option -t for generaing image only should \
 be [ rt|std ]')
                 self.logger.error('Please use "stx build -h" to show the help\
diff --git a/stx/lib/stx/stx_main.py b/stx/lib/stx/stx_main.py
index a172a1f2..4cc146c3 100644
--- a/stx/lib/stx/stx_main.py
+++ b/stx/lib/stx/stx_main.py
@@ -105,7 +105,7 @@ image.\t\teg: [ prepare|distro|image|${pkgname}]')
                                      ', action='store_true', required=False)
         build_subparser.add_argument('-t', '--type',
                                      help='[ rt|std ]: Select the kernel type.\
-                                     ', nargs=1, required=False)
+                                     ', required=False)
         build_subparser.set_defaults(handle=self.handlebuild.handleBuild)
 
         repo_subparser = subparsers.add_parser('repomgr',