diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 61999e43..59b1884d 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -3598,6 +3598,7 @@ Helmut Binder <cco@aon.at>
  override character table
  for adding codes for more languages and special audio tracks
  for adding cMtdCamSlot::TsPostProcess()
+ for adding cMtdHandler::StopDecrypting()
 
 Ulrich Eckhardt <uli@uli-eckhardt.de>
  for reporting a problem with shutdown after user inactivity in case a plugin is
diff --git a/HISTORY b/HISTORY
index 3f3fcf4f..aa58c64a 100644
--- a/HISTORY
+++ b/HISTORY
@@ -9470,3 +9470,4 @@ Video Disk Recorder Revision History
   Herdler).
 - Added codes for more languages and special audio tracks (thanks to Helmut Binder).
 - Added cMtdCamSlot::TsPostProcess() (thanks to Helmut Binder).
+- Added cMtdHandler::StopDecrypting() (thanks to Helmut Binder).
diff --git a/ci.c b/ci.c
index 2f399be2..7d001a4f 100644
--- a/ci.c
+++ b/ci.c
@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: ci.c 4.27 2020/06/16 14:25:43 kls Exp $
+ * $Id: ci.c 4.28 2020/06/16 14:33:32 kls Exp $
  */
 
 #include "ci.h"
@@ -2757,9 +2757,13 @@ void cCamSlot::StartDecrypting(void)
 void cCamSlot::StopDecrypting(void)
 {
   cMutexLock MutexLock(&mutex);
+  if (mtdHandler) {
+     mtdHandler->StopDecrypting();
+     return;
+     }
   if (caProgramList.Count()) {
      caProgramList.Clear();
-     if (!dynamic_cast<cMtdCamSlot *>(this))
+     if (!dynamic_cast<cMtdCamSlot *>(this) || !MasterSlot()->IsDecrypting())
         SendCaPmt(CPCI_NOT_SELECTED);
      }
 }
diff --git a/mtd.c b/mtd.c
index f2c51027..7536dcf8 100644
--- a/mtd.c
+++ b/mtd.c
@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: mtd.c 1.15 2020/06/16 14:25:43 kls Exp $
+ * $Id: mtd.c 1.16 2020/06/16 14:33:32 kls Exp $
  */
 
 #include "mtd.h"
@@ -112,6 +112,14 @@ void cMtdHandler::StartDecrypting(void)
       }
 }
 
+void cMtdHandler::StopDecrypting(void)
+{
+  for (int i = 0; i < camSlots.Size(); i++) {
+      if (camSlots[i]->Device())
+         camSlots[i]->StopDecrypting();
+      }
+}
+
 void cMtdHandler::CancelActivation(void)
 {
   for (int i = 0; i < camSlots.Size(); i++)
@@ -292,8 +300,6 @@ void cMtdCamSlot::StartDecrypting(void)
 void cMtdCamSlot::StopDecrypting(void)
 {
   cCamSlot::StopDecrypting();
-  if (!MasterSlot()->IsDecrypting())
-     MasterSlot()->StopDecrypting();
   cMutexLock MutexLock(&clearMutex);
   mtdMapper->Clear();
   mtdBuffer->Clear();
diff --git a/mtd.h b/mtd.h
index 98ed99a6..914b8b95 100644
--- a/mtd.h
+++ b/mtd.h
@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: mtd.h 1.10 2020/06/16 14:25:43 kls Exp $
+ * $Id: mtd.h 1.11 2020/06/16 14:33:32 kls Exp $
  */
 
 #ifndef __MTD_H
@@ -132,6 +132,8 @@ public:
       ///< Returns true if any of the active MTD CAM slots is currently decrypting.
   void StartDecrypting(void);
       ///< Tells all active MTD CAM slots to start decrypting.
+  void StopDecrypting(void);
+      ///< Tells all active MTD CAM slots to stop decrypting.
   void CancelActivation(void);
       ///< Tells all active MTD CAM slots to cancel activation.
   bool IsActivating(void);