diff --git a/poky/meta/classes/autotools.bbclass b/poky/meta/classes/autotools.bbclass
index 70804b8..2ceb790 100644
--- a/poky/meta/classes/autotools.bbclass
+++ b/poky/meta/classes/autotools.bbclass
@@ -90,7 +90,7 @@
 	cfgscript=`python3 -c "import os; print(os.path.relpath(os.path.dirname('${CONFIGURE_SCRIPT}'), '.'))"`/$cfgscript_name
 	if [ -x "$cfgscript" ] ; then
 		bbnote "Running $cfgscript ${CONFIGUREOPTS} ${EXTRA_OECONF} $@"
-		if ! CONFIG_SHELL=/bin/bash ${CACHED_CONFIGUREVARS} $cfgscript ${CONFIGUREOPTS} ${EXTRA_OECONF} "$@"; then
+		if ! CONFIG_SHELL=${CONFIG_SHELL-/bin/bash} ${CACHED_CONFIGUREVARS} $cfgscript ${CONFIGUREOPTS} ${EXTRA_OECONF} "$@"; then
 			bbnote "The following config.log files may provide further information."
 			bbnote `find ${B} -ignore_readdir_race -type f -name config.log`
 			bbfatal_log "configure failed"