diff --git a/src/nm-logging.c b/src/nm-logging.c
index 48e51421b9..664926c12e 100644
--- a/src/nm-logging.c
+++ b/src/nm-logging.c
@@ -738,7 +738,7 @@ _nm_log_impl (const char *file,
 		{
 			gint64 now, boottime;
 #define _NUM_MAX_FIELDS_SYSLOG_FACILITY 10
-			struct iovec iov_data[12 + _NUM_MAX_FIELDS_SYSLOG_FACILITY];
+			struct iovec iov_data[14 + _NUM_MAX_FIELDS_SYSLOG_FACILITY];
 			struct iovec *iov = iov_data;
 			gpointer iov_free_data[5];
 			gpointer *iov_free = iov_free_data;