diff --git a/arch/arm/src/lpc17xx/lpc17_usbhost.c b/arch/arm/src/lpc17xx/lpc17_usbhost.c
index 351e78d42d..491be114f0 100644
--- a/arch/arm/src/lpc17xx/lpc17_usbhost.c
+++ b/arch/arm/src/lpc17xx/lpc17_usbhost.c
@@ -429,7 +429,7 @@ static struct lpc17_list_s *g_iofree; /* List of unused I/O buffers */
 /* Pool and freelist of asynchronous transfer structures */
 
 static struct lpc17_list_s *g_asynchfree;
-static struct lpc17_list_s g_asynchbuffers[CONFIG_LPC17_USBHOST_NASYNCH];
+static struct lpc17_asynch_s g_asynchbuffers[CONFIG_LPC17_USBHOST_NASYNCH];
 #endif
 
 /*******************************************************************************
@@ -3499,7 +3499,7 @@ struct usbhost_connection_s *lpc17_usbhost_initialize(int controller)
 #ifdef CONFIG_USBHOST_ASYNCH
   /* Initialize asynchronous transfer structures */
 
-  for (i = 0, asynch = (struct lpc17_asynch_s *)g_asynchbuffers;
+  for (i = 0, asynch = g_asynchbuffers;
        i < CONFIG_LPC17_USBHOST_NASYNCH;
        i++, asynch++)
     {
diff --git a/configs/olimex-lpc1766stk/Kconfig b/configs/olimex-lpc1766stk/Kconfig
index b86dd2342a..a5f1fd294f 100644
--- a/configs/olimex-lpc1766stk/Kconfig
+++ b/configs/olimex-lpc1766stk/Kconfig
@@ -4,4 +4,16 @@
 #
 
 if ARCH_BOARD_LPC1766STK
+
+config LPC1766STK_USBHOST_STACKSIZE
+	int "USB host waiter stack size"
+	default 1536 if USBHOST_HUB
+	default 1024 if !USBHOST_HUB
+	depends on USBHOST
+
+config LPC1766STK_USBHOST_PRIO
+	int "USB host waiter task priority"
+	default 100
+	depends on USBHOST
+
 endif
diff --git a/configs/olimex-lpc1766stk/README.txt b/configs/olimex-lpc1766stk/README.txt
index 9f013df892..5a3a47fd2b 100644
--- a/configs/olimex-lpc1766stk/README.txt
+++ b/configs/olimex-lpc1766stk/README.txt
@@ -982,9 +982,10 @@ Configuration Sub-Directories
           When I ran into stack size issues, I just increased the size of
           all threads that had smaller stacks.
 
-          CONFIG_EXAMPLES_HIDKBD_STACKSIZE=2048   : Was 1024
-          CONFIG_HIDKBD_STACKSIZE=2048            : Was 1024
-          CONFIG_SCHED_HPWORKSTACKSIZE=2048       : Was 1024 (1024 is probably ok)
+          CONFIG_EXAMPLES_HIDKBD_STACKSIZE=2048    : Was 1024
+          CONFIG_HIDKBD_STACKSIZE=2048             : Was 1024
+          CONFIG_SCHED_HPWORKSTACKSIZE=2048        : Was 1024 (1024 is probably ok)
+          CONFIG_LPC1766STK_USBHOST_STACKSIZE=1536 | Was 1024
 
        STATUS:
          2015-04-26: The hub basically works.  I do get crashes in the LPC16 USB host driver
diff --git a/configs/olimex-lpc1766stk/src/lpc17_nsh.c b/configs/olimex-lpc1766stk/src/lpc17_nsh.c
index 721d3382b5..0fa1413c17 100644
--- a/configs/olimex-lpc1766stk/src/lpc17_nsh.c
+++ b/configs/olimex-lpc1766stk/src/lpc17_nsh.c
@@ -110,11 +110,11 @@
 #endif
 
 #ifdef NSH_HAVEUSBHOST
-#  ifndef CONFIG_USBHOST_DEFPRIO
-#    define CONFIG_USBHOST_DEFPRIO 50
+#  ifndef CONFIG_LPC1766STK_USBHOST_PRIO
+#    define CONFIG_LPC1766STK_USBHOST_PRIO 50
 #  endif
-#  ifndef CONFIG_USBHOST_STACKSIZE
-#    define CONFIG_USBHOST_STACKSIZE 1024
+#  ifndef CONFIG_LPC1766STK_USBHOST_STACKSIZE
+#    define CONFIG_LPC1766STK_USBHOST_STACKSIZE 1024
 #  endif
 #endif
 
@@ -275,8 +275,8 @@ static int nsh_usbhostinitialize(void)
 
       syslog(LOG_ERR, "ERROR: Start nsh_waiter\n");
 
-      pid = task_create("usbhost", CONFIG_USBHOST_DEFPRIO,
-                        CONFIG_USBHOST_STACKSIZE,
+      pid = task_create("usbhost", CONFIG_LPC1766STK_USBHOST_PRIO,
+                        CONFIG_LPC1766STK_USBHOST_STACKSIZE,
                         (main_t)nsh_waiter, (FAR char * const *)NULL);
       return pid < 0 ? -ENOEXEC : OK;
     }