diff --git a/cpu/lpc2387/include/cpu-conf.h b/cpu/lpc2387/include/cpu-conf.h
index dd0a216d01..fd9ecb10b2 100644
--- a/cpu/lpc2387/include/cpu-conf.h
+++ b/cpu/lpc2387/include/cpu-conf.h
@@ -68,7 +68,7 @@ and the mailinglist (subscription via web site)
  * @{
  */
 #ifndef KERNEL_CONF_STACKSIZE_DEFAULT
-#define KERNEL_CONF_STACKSIZE_DEFAULT	2500
+#define KERNEL_CONF_STACKSIZE_DEFAULT	4500
 #endif
 
 #define KERNEL_CONF_STACKSIZE_IDLE		500