diff --git a/sh/log.sh b/sh/log.sh
index 4e7a63e..2be59e0 100644
--- a/sh/log.sh
+++ b/sh/log.sh
@@ -56,6 +56,7 @@ sh_log_warn() {
 _sh_log() {
 	local prefix="${1}"
 	shift
+	[ ${#} -gt 0 ] || set -- ""
 	local line
 	for line in "${@}"; do
 		if [ -n "${prefix}" ]; then