diff --git a/pb.h b/pb.h
index 61649e9..4ce58ac 100644
--- a/pb.h
+++ b/pb.h
@@ -30,7 +30,7 @@
 #   define PB_PACKED_STRUCT_START _Pragma("pack(push, 1)")
 #   define PB_PACKED_STRUCT_END _Pragma("pack(pop)")
 #   define pb_packed
-#elif defined(_MSC_VER)
+#elif defined(_MSC_VER) && (_MSC_VER >= 1500)
     /* For Microsoft Visual C++ */
 #   define PB_PACKED_STRUCT_START __pragma(pack(push, 1))
 #   define PB_PACKED_STRUCT_END __pragma(pack(pop))