diff --git a/ChangeLog b/ChangeLog
index 777778750..139410e08 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,7 @@
 2004-02-21  Moritz Bunkus  <moritz@bunkus.org>
 
+	* mkvmerge: bug fix: segfault in the RealMedia reader.
+
 	* mmg: bug fix: When adding a Matroska file that contains a track
 	name or a title with non-ASCII characters those would be displayed
 	as UTF-8 in the appropriate input boxes. This has been changed,
diff --git a/src/input/r_real.cpp b/src/input/r_real.cpp
index fbd771845..1abd7c00b 100644
--- a/src/input/r_real.cpp
+++ b/src/input/r_real.cpp
@@ -381,8 +381,9 @@ real_reader_c::parse_headers() {
                 dmx->fourcc[4] = 0;
                 p += 4;
                 if (size > (p - buffer)) {
-                  dmx->extra_data = (unsigned char *)p;
                   dmx->extra_data_size = size - (p - buffer);
+                  dmx->extra_data =
+                    (unsigned char *)safememdup(p, dmx->extra_data_size);
                 }
               }