diff --git a/firmware/usb.c b/firmware/usb.c
index 4e71c06119..2134f4e09c 100644
--- a/firmware/usb.c
+++ b/firmware/usb.c
@@ -72,7 +72,7 @@ static int usb_mmc_countdown = 0;
 
 /* Make sure there's enough stack space for screendump */
 #ifdef USB_FULL_INIT
-static long usb_stack[(DEFAULT_STACK_SIZE + DUMP_BMP_LINESIZE)/sizeof(long)];
+static long usb_stack[(DEFAULT_STACK_SIZE + DUMP_BMP_LINESIZE + 0x400)/sizeof(long)];
 static const char usb_thread_name[] = "usb";
 static unsigned int usb_thread_entry = 0;
 static bool usb_monitor_enabled = false;