diff --git a/drivers/ieee802154/Kconfig b/drivers/ieee802154/Kconfig
index 2f951e1adce..e00b43d2089 100644
--- a/drivers/ieee802154/Kconfig
+++ b/drivers/ieee802154/Kconfig
@@ -97,7 +97,7 @@ config	TI_CC2520_SPI_SLAVE
 
 config	TI_CC2520_FIBER_STACK_SIZE
 	int "Driver's internal fiber stack size"
-	default 640
+	default 800
 	help
 	  This option sets the driver's stack size for its internal fiber.
 	  The default value should be sufficient, but it case it prooves to be