diff --git a/conf/machine/include/intel-common-pkgarch.inc b/conf/machine/include/intel-common-pkgarch.inc
index e50d9cb4..94d77e06 100644
--- a/conf/machine/include/intel-common-pkgarch.inc
+++ b/conf/machine/include/intel-common-pkgarch.inc
@@ -11,5 +11,5 @@ PACKAGE_ARCH:pn-intel-microcode = "${INTEL_COMMON_PACKAGE_ARCH}"
 PACKAGE_ARCH:pn-backport-iwlwifi = "${INTEL_COMMON_PACKAGE_ARCH}"
 PACKAGE_ARCH:pn-ixgbe = "${INTEL_COMMON_PACKAGE_ARCH}"
 PACKAGE_ARCH:pn-ixgbevf = "${INTEL_COMMON_PACKAGE_ARCH}"
-PACKAGE_EXTRA_ARCHS:append += "${INTEL_COMMON_PACKAGE_ARCH}"
+PACKAGE_EXTRA_ARCHS:append = " ${INTEL_COMMON_PACKAGE_ARCH}"
 MACHINEOVERRIDES =. "${INTEL_COMMON_PACKAGE_ARCH}:"