diff --git a/lib_com/options.h b/lib_com/options.h
index fda39ad06bc9a834fcef3a4d421bc27e16b7f93a..00612788b50a05f9468c65535ea6e057f424a506 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -188,6 +188,7 @@
 #define FIX_957_REMOVE_PANNING_DEAD_CODE                /* VA: Remove obsolete non-diegetic panning related code. */
 #define NONBE_FIX_935_EARLY_REFLECTIONS_WRONG_ORDER           /* Qualcomm: issue 953: fix order or ER channels in LC mode*/
 #define FIX_956_DECODER_COMMAND_LINE_FIX                /* VA: Output correct error message when the decoder command-line has too many mandatory arguments. */
+#define FIX_955_FASTCONV_REND_IN_ISM                    /* VA: put FastConv rendering call under DEBUGGING */
 
 /* #################### End BASOP porting switches ############################ */
 
diff --git a/lib_dec/ivas_jbm_dec.c b/lib_dec/ivas_jbm_dec.c
index 56d71fd4e0fd4e036b98c507d8aeb6fed8dab04f..40766887b31e7d4fcb54bbb58dd595fb60c2844f 100644
--- a/lib_dec/ivas_jbm_dec.c
+++ b/lib_dec/ivas_jbm_dec.c
@@ -1062,11 +1062,24 @@ ivas_error ivas_jbm_dec_render(
             {
                 ivas_apply_non_diegetic_panning( p_output, st_ivas->hDecoderConfig->non_diegetic_pan_gain, *nSamplesRendered );
             }
+
+#ifdef FIX_955_FASTCONV_REND_IN_ISM
+#ifdef DEBUGGING
+            else if ( st_ivas->renderer_type == RENDERER_SBA_LINEAR_ENC || st_ivas->renderer_type == RENDERER_BINAURAL_FASTCONV )
+#else
+            else if ( st_ivas->renderer_type == RENDERER_SBA_LINEAR_ENC )
+#endif
+            {
+                /* Convert to Ambisonics */
+                ivas_ism2sba_sf( st_ivas->hTcBuffer->tc, p_output, st_ivas->hIsmRendererData, st_ivas->nchan_transport, *nSamplesRendered, st_ivas->hTcBuffer->n_samples_rendered, st_ivas->hIntSetup.ambisonics_order );
+            }
+#else
             else if ( st_ivas->renderer_type == RENDERER_SBA_LINEAR_ENC || st_ivas->renderer_type == RENDERER_BINAURAL_FASTCONV )
             {
                 /* Convert to Ambisonics; used also for ISM->HOA3->binaural rendering */
                 ivas_ism2sba_sf( st_ivas->hTcBuffer->tc, p_output, st_ivas->hIsmRendererData, st_ivas->nchan_transport, *nSamplesRendered, st_ivas->hTcBuffer->n_samples_rendered, st_ivas->hIntSetup.ambisonics_order );
             }
+#endif
 
             /* Binaural rendering */
             if ( st_ivas->renderer_type == RENDERER_BINAURAL_OBJECTS_TD )