diff --git a/include/common.h b/include/common.h
index 7f21961..31d8ec5 100644
--- a/include/common.h
+++ b/include/common.h
@@ -553,7 +553,7 @@ extern void __inc_compared_osTvType(u8 arg0);
 extern s32 func_80173B60(s32);
 extern s32 D_800AF0B0;
 
-extern void Unpack(s32, s32); 
+extern void Unpack(u8* buffer, u32 size); 
 extern OSMesgQueue MQ_800AF320;
 
 typedef struct {
@@ -561,8 +561,8 @@ typedef struct {
         /* 0x04 */ OSMesgQueue* queue;
         /* 0x08 */ u8 format;
         /* 0x09 */ u8 field_0x9[3];
-        /* 0x0C */ s32 field_0xc;
-        /* 0x10 */ s32 field_0x10;
+        /* 0x0C */ s32 size;
+        /* 0x10 */ u8* buffer;
 } OBUnpackMesg;
 
 extern u32 obCurrentTime;
diff --git a/src/_ob_rabid_jar.c b/src/_ob_rabid_jar.c
index 848d2e7..f7276b3 100644
--- a/src/_ob_rabid_jar.c
+++ b/src/_ob_rabid_jar.c
@@ -462,7 +462,7 @@ void UnpackProc(void) {
     while(1) {
         osRecvMesg(&MQ_800AF320, (OSMesg)&msg, 1);
         if (msg->format == 1) {
-            Unpack(msg->field_0x10, msg->field_0xc);
+            Unpack(msg->buffer, msg->size);
             osSendMesg(msg->queue, msg, OS_MESG_BLOCK);
         } else {
             osSyncPrintf("UnpackProc: no supported format %d\n", msg->format);