diff --git a/client/DialDiscovery.cpp b/client/DialDiscovery.cpp
index 3d04c39..5297b2e 100644
--- a/client/DialDiscovery.cpp
+++ b/client/DialDiscovery.cpp
@@ -314,7 +314,7 @@ void *DialDiscovery::send_mcast()
     int one = 1, my_sock;
     socklen_t addrlen;
     //struct ip_mreq mreq;
-    char send_buf[strlen((char*)ssdp_msearch) + INET_ADDRSTRLEN + 256] = {0,};
+    char send_buf[sizeof(ssdp_msearch) - 1 + INET_ADDRSTRLEN + 256] = {0,};
     int send_size;
     search_conn connection;