diff --git a/scripts/build-efi.sh b/scripts/build-efi.sh
index bc9aeebbf4f..46c28807ef1 100755
--- a/scripts/build-efi.sh
+++ b/scripts/build-efi.sh
@@ -96,6 +96,8 @@ run_qemu() {
 	fi
 	if [[ -n "${serial}" ]]; then
 		extra="-display none -serial mon:stdio"
+	else
+		extra="-serial mon:stdio"
 	fi
 	echo "Running ${qemu}"
 	# Use 512MB since U-Boot EFI likes to have 256MB to play with