-#define memcached_server_count(A) A->number_of_hosts
-#define memcached_server_name(A,B) B.hostname
-#define memcached_server_port(A,B) B.port
-#define memcached_server_list(A) A->hosts
-#define memcached_server_response_count(A,B) A->hosts[B].stack_responses
+#define memcached_server_count(A) (A)->number_of_hosts
+#define memcached_server_name(A,B) (B).hostname
+#define memcached_server_port(A,B) (B).port
+#define memcached_server_list(A) (A)->hosts
+#define memcached_server_response_count(A,B) (A)->hosts[B].stack_responses