diff --git a/bindings/c/tag_c.cpp b/bindings/c/tag_c.cpp
index 238af078..18a7861c 100644
--- a/bindings/c/tag_c.cpp
+++ b/bindings/c/tag_c.cpp
@@ -23,8 +23,6 @@
 #include "config.h"
 #endif
 
-#include "tag_c.h"
-
 #include <stdlib.h>
 #include <fileref.h>
 #include <tfile.h>
@@ -42,6 +40,8 @@
 #include <string.h>
 #include <id3v2framefactory.h>
 
+#include "tag_c.h"
+
 using namespace TagLib;
 
 static List<char *> strings;
diff --git a/taglib/mp4/mp4tag.cpp b/taglib/mp4/mp4tag.cpp
index d7933dbb..30cb1028 100644
--- a/taglib/mp4/mp4tag.cpp
+++ b/taglib/mp4/mp4tag.cpp
@@ -47,6 +47,11 @@ public:
   ItemListMap items;
 };
 
+MP4::Tag::Tag()
+{
+  d = new TagPrivate;
+}
+
 MP4::Tag::Tag(TagLib::File *file, MP4::Atoms *atoms)
 {
   d = new TagPrivate;
diff --git a/taglib/mp4/mp4tag.h b/taglib/mp4/mp4tag.h
index 3e6d667f..2c8b2df8 100644
--- a/taglib/mp4/mp4tag.h
+++ b/taglib/mp4/mp4tag.h
@@ -44,6 +44,7 @@ namespace TagLib {
     class TAGLIB_EXPORT Tag: public TagLib::Tag
     {
     public:
+        Tag();
         Tag(TagLib::File *file, Atoms *atoms);
         ~Tag();
         bool save();