diff --git a/files/copr/provision/files/mock/epel-5-i386.cfg b/files/copr/provision/files/mock/epel-5-i386.cfg
index e3d3f4c2bf..a8b03edf3f 100644
--- a/files/copr/provision/files/mock/epel-5-i386.cfg
+++ b/files/copr/provision/files/mock/epel-5-i386.cfg
@@ -3,7 +3,7 @@ config_opts['target_arch'] = 'i386'
 config_opts['legal_host_arches'] = ('i386', 'i586', 'i686', 'x86_64')
 config_opts['chroot_setup_cmd'] = 'install buildsys-build'
 config_opts['dist'] = 'el5'  # only useful for --resultdir variable subst
-config_opts['macros'] = {}
+if not config_opts.has_key('macros'):  config_opts['macros'] = {}
 config_opts['macros']['%__arch_install_post'] = '%{nil}'
 
 config_opts['yum.conf'] = """
diff --git a/files/copr/provision/files/mock/epel-5-x86_64.cfg b/files/copr/provision/files/mock/epel-5-x86_64.cfg
index a13cd4527a..0f59da54f6 100644
--- a/files/copr/provision/files/mock/epel-5-x86_64.cfg
+++ b/files/copr/provision/files/mock/epel-5-x86_64.cfg
@@ -3,7 +3,7 @@ config_opts['target_arch'] = 'x86_64'
 config_opts['legal_host_arches'] = ('x86_64',)
 config_opts['chroot_setup_cmd'] = 'install buildsys-build'
 config_opts['dist'] = 'el5'  # only useful for --resultdir variable subst
-config_opts['macros'] = {}
+if not config_opts.has_key('macros'):  config_opts['macros'] = {}
 config_opts['macros']['%__arch_install_post'] = '%{nil}'
 
 config_opts['yum.conf'] = """