diff --git a/toolchain/mxdbg/client/packet.c b/toolchain/mxdbg/client/packet.c
index ac7d3b8..a9d08cf 100644
--- a/toolchain/mxdbg/client/packet.c
+++ b/toolchain/mxdbg/client/packet.c
@@ -6,7 +6,7 @@ struct packet *packet_create(size_t packet_size)
 {
 	size_t real_packet_size = sizeof(struct packet) + packet_size
 	                        - sizeof(struct mxdbg_packet);
-	return calloc(1, packet_size);
+	return calloc(1, real_packet_size);
 }
 
 void packet_destroy(struct packet *packet)