diff --git a/code/AssetLib/SIB/SIBImporter.cpp b/code/AssetLib/SIB/SIBImporter.cpp
index 323a69a00..9f299180b 100644
--- a/code/AssetLib/SIB/SIBImporter.cpp
+++ b/code/AssetLib/SIB/SIBImporter.cpp
@@ -85,7 +85,7 @@ static const aiImporterDesc desc = {
 struct SIBChunk {
     uint32_t Tag;
     uint32_t Size;
-} PACK_STRUCT;
+};
 
 enum {
     POS,