diff --git a/lib/mosquitto_internal.h b/lib/mosquitto_internal.h
index 640de160..e401a2fb 100644
--- a/lib/mosquitto_internal.h
+++ b/lib/mosquitto_internal.h
@@ -155,7 +155,7 @@ struct mosquitto {
 #ifndef WITH_BROKER
 	mosq_sock_t sockpairR, sockpairW;
 #endif
-#ifdef __linux__
+#ifdef __GLIBC__
 	struct gaicb *adns; /* For getaddrinfo_a */
 #endif
 	enum _mosquitto_protocol protocol;
diff --git a/lib/net_mosq.c b/lib/net_mosq.c
index c8776c1a..c98b2746 100644
--- a/lib/net_mosq.c
+++ b/lib/net_mosq.c
@@ -271,7 +271,7 @@ static unsigned int psk_client_callback(SSL *ssl, const char *hint,
 }
 #endif
 
-#if defined(WITH_BROKER) && defined(__linux__)
+#if defined(WITH_BROKER) && defined(__GLIBC__)
 /* Async connect, part 1 (dns lookup) */
 int _mosquitto_try_connect_step1(struct mosquitto *mosq, const char *host)
 {
diff --git a/src/bridge.c b/src/bridge.c
index 5f5eb1b3..ad9ef1d8 100644
--- a/src/bridge.c
+++ b/src/bridge.c
@@ -131,7 +131,7 @@ int mqtt3_bridge_new(struct mosquitto_db *db, struct _mqtt3_bridge *bridge)
 		return MOSQ_ERR_NOMEM;
 	}
 
-#ifdef __linux__
+#ifdef __GLIBC__
 	new_context->bridge->restart_t = 1; /* force quick restart of bridge */
 	return mqtt3_bridge_connect_step1(db, new_context);
 #else
diff --git a/src/loop.c b/src/loop.c
index a4014f0c..dba3c5ea 100644
--- a/src/loop.c
+++ b/src/loop.c
@@ -247,7 +247,7 @@ int mosquitto_main_loop(struct mosquitto_db *db, mosq_sock_t *listensock, int li
 					if((context->bridge->start_type == bst_lazy && context->bridge->lazy_reconnect)
 							|| (context->bridge->start_type == bst_automatic && now > context->bridge->restart_t)){
 
-#ifdef __linux__
+#ifdef __GLIBC__
 						if(context->adns){
 							/* Waiting on DNS lookup */
 							rc = gai_error(context->adns);