diff --git a/src/lib/implementations/CECCommandHandler.cpp b/src/lib/implementations/CECCommandHandler.cpp
index 884a9412..cd36463a 100644
--- a/src/lib/implementations/CECCommandHandler.cpp
+++ b/src/lib/implementations/CECCommandHandler.cpp
@@ -270,6 +270,12 @@ int CCECCommandHandler::HandleDeviceVendorCommandWithId(const cec_command& comma
     }
   }
 
+  if (iVendorId == CEC_VENDOR_PIONEER && command.initiator == CECDEVICE_AUDIOSYSTEM)
+  {
+    /** ignore vendor commands from pioneer AVRs */
+    return CEC_ABORT_REASON_REFUSED;
+  }
+
   return CEC_ABORT_REASON_INVALID_OPERAND;
 }
 
diff --git a/src/lib/implementations/RHCommandHandler.cpp b/src/lib/implementations/RHCommandHandler.cpp
index 66c90652..1fa559b4 100644
--- a/src/lib/implementations/RHCommandHandler.cpp
+++ b/src/lib/implementations/RHCommandHandler.cpp
@@ -60,6 +60,5 @@ int CRHCommandHandler::HandleDeviceVendorCommandWithId(const cec_command &comman
   {
     // ignore unknown vendor commands sent by onkyo devices, bugzid: 2559
   }
-  return CEC_ABORT_REASON_INVALID_OPERAND;
-
+  return CEC_ABORT_REASON_REFUSED;
 }