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-rw-r--r--core/lwip/src/arch/sys_arch.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/core/lwip/src/arch/sys_arch.c b/core/lwip/src/arch/sys_arch.c
index b0bc0b6f..65be3874 100644
--- a/core/lwip/src/arch/sys_arch.c
+++ b/core/lwip/src/arch/sys_arch.c
@@ -38,7 +38,7 @@ sys_mbox_t sys_mbox_new(int size)
{
struct mailbox *mbox;
- mbox = malloc(sizeof(struct mailbox) + size*sizeof(void *));
+ mbox = malloc(MBOX_BYTES(size));
if (!mbox)
return NULL;