@@ -334,11 +334,12 @@
 	for (p = argv[0]; *p!=0; ++p) {
 		if(*p == '/') basename = p + 1;
 	}
 	nsz = p - basename;
-	char shid[nsz + sizeof shmem_prefix + 0];
+	char shid[nsz + sizeof shmem_prefix];
 	strncpy(shid,shmem_prefix,sizeof shmem_prefix);
 	strncpy(shid + sizeof shmem_prefix - 1, basename, nsz);
+	shid[nsz + sizeof shmem_prefix - 1] = 0;
 
 	if (op == mode_go) {
 		int fd;
 		if ((fd = shm_open(shid, O_RDWR, 0600)) == -1) {