diff --git a/lib_com/options.h b/lib_com/options.h
index 91172d59afc4c1193ebe4ee2bdc32e06835c7138..91b99736b0b8d7190ef8258db933ef67d252a7a8 100755
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -120,6 +120,7 @@
 #define NONBE_FIX_986_MC_BW_SWITCHING                   /* FhG: fix crash in bw and br switching with MC */
 #define NONBE_FIX_975_JBM_USAN                          /* FhG: Fix issue #975, USAN in JBM decoding ad 13.2kbps */
 #define FIX_699_FILE_READER_JBM_TSM                     /* VA: issue 699: complement FileReader_getFilePath() logic for TSM and JBM */
+#define FIX_997_REMOVE_SPAR_DEC_UPMIXER                 /* VA: issue 997: remove obsolete function ivas_spar_dec_upmixer() */
 
 #define NONBE_FIX_947_STEREO_DMX_EVS_POC                      /* Orange: Fix clicks on POC */
 #ifdef NONBE_FIX_947_STEREO_DMX_EVS_POC
diff --git a/lib_dec/ivas_spar_decoder_fx.c b/lib_dec/ivas_spar_decoder_fx.c
index 2c425ad72374b4a194242b3b08c044f7d8cd8f9f..b13c6ab7a92b30bf250fa997d52a6eab6661de8d 100644
--- a/lib_dec/ivas_spar_decoder_fx.c
+++ b/lib_dec/ivas_spar_decoder_fx.c
@@ -1534,12 +1534,20 @@ void ivas_spar_dec_set_render_map_fx(
     return;
 }
 
+#ifdef FIX_997_REMOVE_SPAR_DEC_UPMIXER
 
+/*-------------------------------------------------------------------*
+ * ivas_spar_dec_set_render_params()
+ *
+ * IVAS SPAR set rendering parameters
+ *-------------------------------------------------------------------*/
+#else
 /*-------------------------------------------------------------------*
  * ivas_spar_dec_upmixer()
  *
  * IVAS SPAR upmixer
  *-------------------------------------------------------------------*/
+#endif
 
 void ivas_spar_dec_set_render_params_fx(
     Decoder_Struct *st_ivas,   /* i/o: IVAS decoder handle                     */