diff --git a/src/switch_utils.c b/src/switch_utils.c
index 4b5c7d9b19..4d1532df1d 100644
--- a/src/switch_utils.c
+++ b/src/switch_utils.c
@@ -756,6 +756,7 @@ static int get_netmask(struct sockaddr_in *me, int *mask)
 
 		if (s && m && s->sin_addr.s_addr == me->sin_addr.s_addr) {
 			*mask = m->sin_addr.s_addr;
+			freeifaddrs(ifaddrs);
 			return 0;
 		}
 	}