diff --git a/recipes-support/swupdate/swupdate.inc b/recipes-support/swupdate/swupdate.inc
index 091bbc2..45fcf3c 100644
--- a/recipes-support/swupdate/swupdate.inc
+++ b/recipes-support/swupdate/swupdate.inc
@@ -259,11 +259,15 @@ python () {
 }
 
 do_configure () {
-    cat > ${WORKDIR}/.config <<HEREDOC
+
+    # Write defconfig first to ensure that additional CONFIG_ entries
+    # getting respected by merge_config.sh
+    cat ${UNPACKDIR}/defconfig > ${WORKDIR}/.config
+
+    cat >> ${WORKDIR}/.config <<HEREDOC
 CONFIG_EXTRA_CFLAGS="${CFLAGS}"
 CONFIG_EXTRA_LDFLAGS="${LDFLAGS}"
 HEREDOC
-    cat ${UNPACKDIR}/defconfig >> ${WORKDIR}/.config
 
     merge_config.sh -O ${B} -m ${WORKDIR}/.config ${@" ".join(find_cfgs(d))}
     (cd ${S} && cml1_do_configure)