fix pack file magic value
diff --git a/lib/pack.h b/lib/pack.h
index 3961f52..99603fc 100644
--- a/lib/pack.h
+++ b/lib/pack.h
@@ -62,7 +62,7 @@ struct got_packidx_v2_hdr {
struct got_packfile_hdr {
uint32_t signature;
-#define GOT_PACKFILE_SIGNATURE 0x4041434b /* 'P' 'A' 'C' 'K' */
+#define GOT_PACKFILE_SIGNATURE 0x5041434b /* 'P' 'A' 'C' 'K' */
uint32_t version; /* big endian */
#define GOT_PACKFILE_VERSION 2
uint32_t nobjects; /* big endian */