diff --git a/include/assimp/material.h b/include/assimp/material.h
index a12e7d076..502b89746 100644
--- a/include/assimp/material.h
+++ b/include/assimp/material.h
@@ -491,7 +491,7 @@ struct aiUVTransform
     }
 #endif
 
-} PACK_STRUCT;
+};
 
 #include "./Compiler/poppack1.h"