diff --git a/meta/conf/layer.conf b/meta/conf/layer.conf
index c0c2930f0d..dac9c97b62 100644
--- a/meta/conf/layer.conf
+++ b/meta/conf/layer.conf
@@ -18,4 +18,13 @@ PATH := "${PATH}:${COREBASE}/scripts"
 
 QEMUIMAGETESTS := "${COREBASE}/scripts/qemuimage-tests"
 
-SIGGEN_EXCLUDERECIPES_ABISAFE = "sysvinit-inittab shadow-securetty opkg-config-base netbase formfactor xserver-xf86-config pointercal base-files"
+SIGGEN_EXCLUDERECIPES_ABISAFE += " \
+  sysvinit-inittab \
+  shadow-securetty \
+  opkg-config-base \
+  netbase \
+  formfactor \
+  xserver-xf86-config \
+  pointercal \
+  base-files \
+"