diff --git a/source/darwin/dispatch_queue_event_loop.c b/source/darwin/dispatch_queue_event_loop.c
index 3fb95641f..515bb5887 100644
--- a/source/darwin/dispatch_queue_event_loop.c
+++ b/source/darwin/dispatch_queue_event_loop.c
@@ -153,6 +153,7 @@ static struct aws_string *s_get_unique_dispatch_queue_id(struct aws_allocator *a
     return result;
 }
 
+#if defined(aws_event_loop_new_with_dispatch_queue)
 /* Setup a dispatch_queue with a scheduler. */
 struct aws_event_loop *aws_event_loop_new_with_dispatch_queue(
     struct aws_allocator *alloc,
@@ -222,6 +223,8 @@ struct aws_event_loop *aws_event_loop_new_with_dispatch_queue(
     return NULL;
 }
 
+#endif // AWS_ENABLE_DISPATCH_QUEUE
+
 static void s_dispatch_queue_destroy_task(void *context) {
     struct dispatch_loop *dispatch_loop = context;
 
diff --git a/source/darwin/nw_socket.c b/source/darwin/nw_socket.c
index 9c8e77307..84bda4a81 100644
--- a/source/darwin/nw_socket.c
+++ b/source/darwin/nw_socket.c
@@ -690,6 +690,7 @@ static void s_socket_impl_destroy(void *sock_ptr) {
     nw_socket = NULL;
 }
 
+#if defined(AWS_ENABLE_DISPATCH_QUEUE)
 int aws_socket_init_apple_nw_socket(
     struct aws_socket *socket,
     struct aws_allocator *alloc,
@@ -737,6 +738,7 @@ int aws_socket_init_apple_nw_socket(
 
     return AWS_OP_SUCCESS;
 }
+#endif // AWS_ENABLE_DISPATCH_QUEUE
 
 static void s_client_set_dispatch_queue(struct aws_io_handle *handle, void *queue) {
     nw_connection_set_queue(handle->data.handle, queue);
diff --git a/source/event_loop.c b/source/event_loop.c
index c5cf90095..1a053abc1 100644
--- a/source/event_loop.c
+++ b/source/event_loop.c
@@ -107,6 +107,7 @@ enum aws_event_loop_type aws_event_loop_get_default_type(void) {
     AWS_LOGF_ERROR(
         AWS_LS_IO_EVENT_LOOP,
         "Failed to get default event loop type. The library is not built correctly on the platform.");
+    return AWS_EVENT_LOOP_PLATFORM_DEFAULT;
 #endif
 }
 
diff --git a/source/posix/socket.c b/source/posix/socket.c
index 97bbb60d1..88ee14334 100644
--- a/source/posix/socket.c
+++ b/source/posix/socket.c
@@ -301,7 +301,7 @@ static int s_socket_init(
 
     return AWS_OP_SUCCESS;
 }
-
+#if defined(AWS_ENABLE_KQUEUE) || defined(AWS_ENABLE_EPOLL)
 int aws_socket_init_posix(
     struct aws_socket *socket,
     struct aws_allocator *alloc,
@@ -309,6 +309,7 @@ int aws_socket_init_posix(
     AWS_ASSERT(options);
     return s_socket_init(socket, alloc, options, -1);
 }
+#endif // AWS_ENABLE_KQUEUE || AWS_ENABLE_EPOLL
 
 static void s_socket_clean_up(struct aws_socket *socket) {
     if (!socket->impl) {
diff --git a/source/socket.c b/source/socket.c
index 9dc27716b..15b1cc3f6 100644
--- a/source/socket.c
+++ b/source/socket.c
@@ -227,7 +227,7 @@ static int aws_socket_impl_type_validate_platform(enum aws_socket_impl_type type
     return AWS_OP_SUCCESS;
 }
 
-#if !defined(AWS_ENABLE_EPOLL) && !defined(AWS_ENABLE_KQUEUE) && !defined(AWS_USE_SECITEM)
+#if !defined(AWS_ENABLE_EPOLL) && !defined(AWS_ENABLE_KQUEUE)
 int aws_socket_init_posix(
     struct aws_socket *socket,
     struct aws_allocator *alloc,
@@ -238,7 +238,7 @@ int aws_socket_init_posix(
     AWS_LOGF_DEBUG(AWS_LS_IO_SOCKET, "Posix socket is not supported on the platform.");
     return aws_raise_error(AWS_ERROR_PLATFORM_NOT_SUPPORTED);
 }
-#endif
+#endif // !AWS_ENABLE_EPOLL && !AWS_ENABLE_KQUEUE
 
 #ifndef AWS_ENABLE_IO_COMPLETION_PORTS
 int aws_socket_init_winsock(