diff --git a/Source/msg.cpp b/Source/msg.cpp
index a6f68f9d6..662f3855c 100644
--- a/Source/msg.cpp
+++ b/Source/msg.cpp
@@ -55,7 +55,7 @@ TMegaPkt *msg_get_next_packet()
 {
 	TMegaPkt *result;
 
-	sgpCurrPkt = (TMegaPkt *)DiabloAllocPtr(32008);
+	sgpCurrPkt = (TMegaPkt *)DiabloAllocPtr(TMEGAPKT_SIZE);
 	sgpCurrPkt->pNext = NULL;
 	sgpCurrPkt->dwSpaceLeft = 32000;
 
diff --git a/structs.h b/structs.h
index 622e2085f..0191eb723 100644
--- a/structs.h
+++ b/structs.h
@@ -955,11 +955,14 @@ typedef struct DJunk {
 } DJunk;
 #pragma pack(pop)
 
+#pragma pack(push, 1)
 typedef struct TMegaPkt {
 	struct TMegaPkt *pNext;
 	DWORD dwSpaceLeft;
 	BYTE data[32000];
 } TMegaPkt;
+#pragma pack(pop)
+#define TMEGAPKT_SIZE sizeof(TMegaPkt)
 
 typedef struct TBuffer {
 	DWORD dwNextWriteOffset;