diff --git a/lib/libc/gen/syslog.c b/lib/libc/gen/syslog.c
index fa19907ca2c..261dd106314 100644
--- a/lib/libc/gen/syslog.c
+++ b/lib/libc/gen/syslog.c
@@ -335,6 +335,7 @@ closelog()
 {
 	(void)_close(LogFile);
 	LogFile = -1;
+	LogTag = NULL;
 	connected = 0;
 }