diff --git a/src/libsystemd-network/sd-dhcp-lease.c b/src/libsystemd-network/sd-dhcp-lease.c
index c089b4278b..17b2bb7aa4 100644
--- a/src/libsystemd-network/sd-dhcp-lease.c
+++ b/src/libsystemd-network/sd-dhcp-lease.c
@@ -333,7 +333,7 @@ static int lease_parse_string(const uint8_t *option, size_t len, char **ret) {
                 if (memchr(option, 0, len - 1))
                         return -EINVAL;
 
-                string = strndup((const char *) option, len);
+                string = memdup_suffix0((const char *) option, len);
                 if (!string)
                         return -ENOMEM;