diff --git a/ChangeLog b/ChangeLog
index 8c36fa8cd..9f84eec1d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,7 @@
 2004-05-06  Moritz Bunkus  <moritz@bunkus.org>
 
+	* mmg: Fix for compilation with wxWindows < 2.4.2.
+
 	* Released v0.8.9.
 
 	* mmg: new feature: mmg will ask for confirmation before
diff --git a/src/mkvinfo_gui.cpp b/src/mkvinfo_gui.cpp
index 8802bb554..f631a8dbf 100644
--- a/src/mkvinfo_gui.cpp
+++ b/src/mkvinfo_gui.cpp
@@ -17,6 +17,10 @@
 using namespace libebml;
 using namespace libmatroska;
 
+#if ! wxCHECK_VERSION(2,4,2)
+# define wxTreeItemIdValue long
+#endif
+
 mi_frame *frame;
 
 enum {
diff --git a/src/mmg/tab_chapters.cpp b/src/mmg/tab_chapters.cpp
index d0a1262f3..7df7ada6a 100644
--- a/src/mmg/tab_chapters.cpp
+++ b/src/mmg/tab_chapters.cpp
@@ -45,6 +45,10 @@ using namespace std;
 using namespace libebml;
 using namespace libmatroska;
 
+#if ! wxCHECK_VERSION(2,4,2)
+# define wxTreeItemIdValue long
+#endif
+
 class chapters_drop_target_c: public wxFileDropTarget {
 private:
   tab_chapters *owner;