diff --git a/main.c b/main.c
index d1fad56..b19850d 100644
--- a/main.c
+++ b/main.c
@@ -43,6 +43,8 @@ void getutmp( int pid, char user[], char host_ip[], char host_ipv6[], time_t * t
 	int x;
 	char str[6];
 
+	host_ip[0]='\0';
+	host_ipv6[0]='\0';
 	setutent();
 	while (	(utmp = getutent()) != NULL )
 	{