build/fw/coreboot: fix error "unexpected operator"

Signed-off-by: Leah Rowe <leah@libreboot.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/script/build/fw/coreboot b/script/build/fw/coreboot
index 323fc40d..d0357c59 100755
--- a/script/build/fw/coreboot
+++ b/script/build/fw/coreboot
@@ -58,7 +58,7 @@ main()
 		targets="* bin/${board}\n${targets}"
 	done
 
-	[ -z ${targets} ] && err "No ROM images were compiled"
+	[ -z "${targets}" ] && err "No ROM images were compiled"
 	printf "\nROM images available in these directories:\n"
 	printf "${targets}^^ ROM images available in these directories.\n\n"
 }