diff --git a/cgminer.c b/cgminer.c
index 613b4068..756e0059 100644
--- a/cgminer.c
+++ b/cgminer.c
@@ -69,9 +69,7 @@ enum workio_commands {
 struct workio_cmd {
 	enum workio_commands	cmd;
 	struct thr_info		*thr;
-	union {
-		struct work	*work;
-	} u;
+	struct work		*work;
 	bool			lagging;
 };
 
@@ -1906,7 +1904,7 @@ static void workio_cmd_free(struct workio_cmd *wc)
 
 	switch (wc->cmd) {
 	case WC_SUBMIT_WORK:
-		free_work(wc->u.work);
+		free_work(wc->work);
 		break;
 	default: /* do nothing */
 		break;
@@ -2220,7 +2218,7 @@ static void check_solve(struct work *work)
 static void *submit_work_thread(void *userdata)
 {
 	struct workio_cmd *wc = (struct workio_cmd *)userdata;
-	struct work *work = wc->u.work;
+	struct work *work = wc->work;
 	struct pool *pool = work->pool;
 	struct curl_ent *ce;
 	int failures = 0;
@@ -3852,11 +3850,11 @@ bool submit_work_sync(struct thr_info *thr, const struct work *work_in)
 		return false;
 	}
 
-	wc->u.work = make_work();
+	wc->work = make_work();
 	wc->cmd = WC_SUBMIT_WORK;
 	wc->thr = thr;
-	memcpy(wc->u.work, work_in, sizeof(*work_in));
-	wc->u.work->share_found_time = time(NULL);
+	memcpy(wc->work, work_in, sizeof(*work_in));
+	wc->work->share_found_time = time(NULL);
 
 	applog(LOG_DEBUG, "Pushing submit work to work thread");
 
diff --git a/driver-ztex.c b/driver-ztex.c
index e38be748..db223927 100644
--- a/driver-ztex.c
+++ b/driver-ztex.c
@@ -63,7 +63,8 @@ static void ztex_detect(void)
 	struct cgpu_info *ztex;
 
 	cnt = libztex_scanDevices(&ztex_devices);
-	applog(LOG_WARNING, "Found %d ztex board(s)", cnt);
+	if (cnt > 0)
+		applog(LOG_WARNING, "Found %d ztex board%s", cnt, cnt > 1 ? "s" : "");
 
 	for (i = 0; i < cnt; i++) {
 		ztex = calloc(1, sizeof(struct cgpu_info));
diff --git a/fpgautils.c b/fpgautils.c
index 79da8541..12e3847d 100644
--- a/fpgautils.c
+++ b/fpgautils.c
@@ -159,6 +159,7 @@ serial_open(const char*devpath, unsigned long baud, signed short timeout, bool p
 			applog(LOG_ERR, "%s is already in use by another process", devpath);
 			break;
 		default:
+			applog(LOG_DEBUG, "Open %s failed, GetLastError:%u", devpath, e);
 			break;
 		}
 		return -1;
@@ -196,6 +197,9 @@ serial_open(const char*devpath, unsigned long baud, signed short timeout, bool p
 	{
 		if (errno == EACCES)
 			applog(LOG_ERR, "Do not have user privileges required to open %s", devpath);
+		else
+			applog(LOG_DEBUG, "Open %s failed, errno:%d", devpath, errno);
+
 		return -1;
 	}