diff --git a/ChangeLog b/ChangeLog
index 6c3111ecc..6abd1b859 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2005-03-14  Moritz Bunkus  <moritz@bunkus.org>
+
+	* mkvmerge: bug fix: AC3 detection was broken in rare cases.
+
 2005-03-13  Moritz Bunkus  <moritz@bunkus.org>
 
 	* mmg: bug fix: If the TEMP environment variable contains spaces
diff --git a/src/common/ac3_common.cpp b/src/common/ac3_common.cpp
index e0fdb6ab0..e6acd3444 100644
--- a/src/common/ac3_common.cpp
+++ b/src/common/ac3_common.cpp
@@ -124,11 +124,11 @@ find_consecutive_ac3_headers(const unsigned char *buf,
   if (pos < 0)
     return -1;
   mxverb(2, "ac3_reader: Found tag at %d size %d\n", pos, ac3header.bytes);
-  base = pos + 1;
 
   if (num == 1)
     return pos;
 
+  base = pos;
   do {
     mxverb(2, "find_cons_ac3_h: starting with base at %d\n", base);
     offset = ac3header.bytes;