diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 4b9b5894..ffad2c81 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -3373,6 +3373,7 @@ Stefan Hofmann <stefan.hofmann@t-online.de>
  for adding vdrrootdir and incdir to vdr.pc
  for fixing some typos in the translation files
  for adding 1 to Utf8BufSize() for worst case
+ for adding a header to the backtrace
 
 Stefan Blochberger <Stefan.Blochberger@gmx.de>
  for suggesting to automatically display the progress display whenever replay of a
diff --git a/HISTORY b/HISTORY
index 5aa5bda9..db6b548b 100644
--- a/HISTORY
+++ b/HISTORY
@@ -10034,7 +10034,7 @@ Video Disk Recorder Revision History
   (suggested by Stefan Hofmann).
 - Added vdrrootdir and incdir to vdr.pc (thanks to Stefan Hofmann).
 
-2025-01-13:
+2025-01-15:
 
 - Removed all DEPRECATED_* code.
 - Fixed error checking in case the fps value can't be determined by the frame parser.
@@ -10052,3 +10052,4 @@ Video Disk Recorder Revision History
 - Added 1 to Utf8BufSize() for worst case (thanks to Stefan Hofmann).
 - Fixed handling margins for timers that are not VPS controlled and not spawned (thanks
   to Markus Ehrnsperger).
+- Added a header to the backtrace (thanks to Stefan Hofmann).
diff --git a/thread.c b/thread.c
index 98f23cdf..b00448af 100644
--- a/thread.c
+++ b/thread.c
@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: thread.c 5.2 2024/01/18 13:01:07 kls Exp $
+ * $Id: thread.c 5.3 2025/01/15 08:43:12 kls Exp $
  */
 
 #include "thread.h"
@@ -597,6 +597,7 @@ cStateLockLog::cStateLockLog(void)
 void cStateLockLog::Dump(const char *Name, tThreadId ThreadId)
 {
   dsyslog("--- begin invalid lock sequence report");
+  dsyslog("TID    T  C  R  DR S                 ST");
   int LastFlags = 0;
   for (int i = 0; i < SLL_SIZE; i++) {
       if (tThreadId tid = logThreadIds[logIndex]) {