diff -up yum-3.4.3/yum/config.py.old yum-3.4.3/yum/config.py
--- yum-3.4.3/yum/config.py.old	2017-10-06 13:24:25.014855429 +0200
+++ yum-3.4.3/yum/config.py	2017-10-06 13:36:38.602637131 +0200
@@ -755,6 +755,7 @@ class YumConf(StartupConf):
     username = Option()
     password = Option()
     installonlypkgs = ListOption(['kernel', 'kernel-bigmem',
+                                  'installonlypkg(kernel)',
                                   'installonlypkg(kernel-module)',
                                   'installonlypkg(vm)',
             'kernel-enterprise','kernel-smp', 'kernel-debug',