diff --git a/lib_com/options.h b/lib_com/options.h
index 7b19fc92a1d5405d9ebd31166a9b6db6afc95197..94d22ec458f90f9fcfc979871ff34c4e62fce4bf 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -131,7 +131,7 @@
 #ifdef NONBE_FIX_947_STEREO_DMX_EVS_PHA
 #define NONBE_FIX_947_STEREO_DMX_FADOPT                       /* Orange: Fading optimisation */  
 #endif
-
+#define NONBE_FIX_999_JBM_MCT_FLUSH                           /* FhG: issue #999: fix wrong flushing for MCT at a JBM rate switch */
 #define FIX_1003_PARAMISM_BINAURAL_RECONFIG_USAN        /* FhG: fix for #1003: fix USAN caused by ParamISM reconfig                    */
 #define FIX_1001_ARI_HM_OVERFLOW                        /* FhG: (no changes needed in BASOP) fix for undef behaviour in in the harmonic TCX model arithmetic coder */
 #define NONBE_FIX_1005_MC_RS_TCBUFFER_UPDATE                  /* FhG: issue #1005: fix TC Buffer update at a MC rate switch */
diff --git a/lib_dec/ivas_jbm_dec_fx.c b/lib_dec/ivas_jbm_dec_fx.c
index 8db29e4dff642695362757c900f328075884b969..5afbc3acba9d255b6341bc4b6b5e4f3d17d58cd4 100644
--- a/lib_dec/ivas_jbm_dec_fx.c
+++ b/lib_dec/ivas_jbm_dec_fx.c
@@ -2820,7 +2820,11 @@ ivas_error ivas_jbm_dec_flush_renderer_fx(
 
                     ivas_binaural_add_LFE_fx( st_ivas, hTcBuffer->n_samples_granularity, st_ivas->hTcBuffer->tc_fx, p_output_fx );
                 }
+#ifdef NONBE_FIX_999_JBM_MCT_FLUSH
+                ELSE IF( EQ_16( renderer_type_old, RENDERER_BINAURAL_OBJECTS_TD ) )
+#else
                 ELSE IF( EQ_16( st_ivas->renderer_type, RENDERER_BINAURAL_OBJECTS_TD ) )
+#endif
                 {
                     IF( NE_32( ( error = ivas_td_binaural_renderer_sf_fx( st_ivas, p_output_fx, hTcBuffer->n_samples_granularity ) ), IVAS_ERR_OK ) )
                     {
@@ -2828,6 +2832,12 @@ ivas_error ivas_jbm_dec_flush_renderer_fx(
                     }
                     ivas_binaural_add_LFE_fx( st_ivas, *nSamplesRendered, st_ivas->hTcBuffer->tc_fx, p_output_fx );
                 }
+#ifdef NONBE_FIX_999_JBM_MCT_FLUSH
+                ELSE
+                {
+                    return IVAS_ERROR( IVAS_ERR_WRONG_MODE, "Wrong renderer in MCT VoIP renderer flushing!" );
+                }
+#endif
             }
             ELSE
             {