diff --git a/ccminer.cpp b/ccminer.cpp
index 960eb6620..f3eba6a7e 100644
--- a/ccminer.cpp
+++ b/ccminer.cpp
@@ -1180,7 +1180,7 @@ static bool get_work(struct thr_info *thr, struct work *work)
 	}
 
 	/* fill out work request message */
-	wc = (struct workio_cmd *)calloc(1, sizeof(*wc));
+	wc = (struct workio_cmd *)calloc(1, sizeof(struct workio_cmd));
 	if(wc == NULL)
 	{
 		applog(LOG_ERR, "Out of memory!");
@@ -1213,7 +1213,7 @@ static bool submit_work(struct thr_info *thr, const struct work *work_in)
 {
 	struct workio_cmd *wc;
 	/* fill out work request message */
-	wc = (struct workio_cmd *)calloc(1, sizeof(*wc));
+	wc = (struct workio_cmd *)calloc(1, sizeof(struct workio_cmd));
 	if(wc == NULL)
 	{
 		applog(LOG_ERR, "Out of memory!");
diff --git a/util.cpp b/util.cpp
index d06a840a0..67fcdf145 100644
--- a/util.cpp
+++ b/util.cpp
@@ -185,7 +185,7 @@ void applog(int prio, const char *fmt, ...)
 		free(f);
 		if (opt_logfile)
 		{
-			fl = (char*)alloca(len);
+			fl = (char*)malloc(len);
 			sprintf(fl, "[%d-%02d-%02d %02d:%02d:%02d] %s\n",
 					tm.tm_year + 1900,
 					tm.tm_mon + 1,