diff --git a/include/metalsvm/config.h.example b/include/metalsvm/config.h.example
index f30d3d0e..299e1782 100644
--- a/include/metalsvm/config.h.example
+++ b/include/metalsvm/config.h.example
@@ -33,7 +33,7 @@ extern "C" {
 #define KMSG_SIZE		(128*1024)
 #define PAGE_SHIFT		12
 #define CACHE_LINE		64
-#define MAILBOX_SIZE		8
+#define MAILBOX_SIZE		32
 #define TIMER_FREQ		100	/* in HZ */
 #define CLOCK_TICK_RATE		1193182	/* 8254 chip's internal oscillator frequency */
 #define INT_SYSCALL		0x80
diff --git a/include/metalsvm/config.h.scc b/include/metalsvm/config.h.scc
index 82650eb4..97006560 100644
--- a/include/metalsvm/config.h.scc
+++ b/include/metalsvm/config.h.scc
@@ -33,7 +33,7 @@ extern "C" {
 #define KMSG_SIZE		(128*1024)
 #define PAGE_SHIFT		12
 #define CACHE_LINE		32
-#define MAILBOX_SIZE		8
+#define MAILBOX_SIZE		32
 #define TIMER_FREQ		100	/* in HZ */
 #define CLOCK_TICK_RATE		1193182	/* 8254 chip's internal oscillator frequency */
 #define INT_SYSCALL		0x80