diff --git a/hermit/include/hermit/config.h b/hermit/include/hermit/config.h
index bce17dead..45dc326ab 100644
--- a/hermit/include/hermit/config.h
+++ b/hermit/include/hermit/config.h
@@ -41,7 +41,7 @@ extern "C" {
 #define VIDEO_MEM_ADDR		0xB8000 /* the video memory address */
 #define CACHE_LINE		64
 #define KERNEL_STACK_SIZE	(8*1024)
-#define DEFAULT_STACK_SIZE	(64*1024*1024)
+#define DEFAULT_STACK_SIZE	(64*1024)
 #define KMSG_SIZE		(4*1024)
 #define INT_SYSCALL		0x80
 #define MAILBOX_SIZE		128