diff --git a/lib_com/options.h b/lib_com/options.h
index 83481715bb6c0dbdf693a708ae618fd17e2e5c35..9de0874dbbe35d2eb19e0e7c99157904c3058bcf 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -167,7 +167,7 @@
 #define NONBE_FIX_861_MASA_CRASH_STEREO_SWITCHING             /* VA: issue 861: fix MASA 2TC crash when switching from MDCT stereo to TD/DFT stereo */
 #define BE_FIX_867_PARAMC_RECONFIG                            /* FhG: issue #867: fix ParamMC CLDFB buffer dealloc when reconfiguring */
 #define NONBE_FIX_850_MASA_HBR_META_RATIO_DECODING            /* Nokia: issue #850: Fixes rare non-valid diffuseness and energy ratio values in 2dir MASA. */
-
+#define NONBE_FIX_MDCT_STEREO_DTX_MONO_OUT                    /* FhG: fix clicks in DTX -> active transition frames in MDCT-Stereo with mono output */
 
 /* ##################### End NON-BE switches ########################### */
 
diff --git a/lib_dec/ivas_stereo_switching_dec.c b/lib_dec/ivas_stereo_switching_dec.c
index d91fdf4b568797ed0d8090ccd01752dd9fa0d662..e98adfd60b9a6e49a7da21e499c59d736a6eee50 100644
--- a/lib_dec/ivas_stereo_switching_dec.c
+++ b/lib_dec/ivas_stereo_switching_dec.c
@@ -1302,6 +1302,13 @@ void synchro_synthesis(
             }
         }
 
+#ifdef NONBE_FIX_MDCT_STEREO_DTX_MONO_OUT
+        if ( hCPE->element_mode == IVAS_CPE_MDCT && hCPE->nchan_out == 1 && !is_DTXrate( hCPE->element_brate ) && is_DTXrate( hCPE->last_element_brate ) )
+        {
+            mvr2r( sts[0]->prev_synth_buffer, sts[1]->prev_synth_buffer, delay_comp_TD );
+        }
+#endif
+
         nChannels = ( hCPE->element_mode == IVAS_CPE_MDCT ) ? 2 : hCPE->nchan_out;
         for ( n = 0; n < nChannels; n++ )
         {