diff --git a/lib_com/options.h b/lib_com/options.h
index d1aaf2547133ef0437a3af4222a1e8390d205034..18fc6926670eca506e1b27286ab734e739afbb96 100755
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -157,7 +157,7 @@
 #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 FIX_944_REMOVE_LS_RENDERER_CALL_IN_STEREO       /* VA: issue 994: remove an obsolete call of function ivas_ls_setup_conversion() in stereo */
-
+#define FIX_1003_PARAMISM_BINAURAL_RECONFIG_USAN        /* FhG: fix for #1003: fix USAN caused by ParamISM reconfig                    */
 
 
 /* #################### End BE switches ################################## */
diff --git a/lib_dec/ivas_ism_dec.c b/lib_dec/ivas_ism_dec.c
index 5583f58651746bd343fc8b52c41b3ced9e2314c3..50c994dfd781e6416db4fdcbb4e9a900cb7371a6 100644
--- a/lib_dec/ivas_ism_dec.c
+++ b/lib_dec/ivas_ism_dec.c
@@ -343,11 +343,13 @@ static ivas_error ivas_ism_bitrate_switching_dec(
         tc_nchan_allocate_new = tc_nchan_tc_new;
         tc_nchan_full_new = tc_nchan_tc_new;
 
+#ifndef FIX_1003_PARAMISM_BINAURAL_RECONFIG_USAN
         if ( st_ivas->renderer_type == RENDERER_BINAURAL_PARAMETRIC || st_ivas->renderer_type == RENDERER_BINAURAL_PARAMETRIC_ROOM || st_ivas->renderer_type == RENDERER_STEREO_PARAMETRIC )
         {
             tc_nchan_allocate_new = 2 * BINAURAL_CHANNELS;
             tc_nchan_full_new = tc_nchan_allocate_new;
         }
+#endif
 
         if ( st_ivas->ism_mode == ISM_MODE_PARAM && ( st_ivas->renderer_type != RENDERER_MONO_DOWNMIX && st_ivas->renderer_type != RENDERER_DISABLE && st_ivas->renderer_type != RENDERER_BINAURAL_PARAMETRIC && st_ivas->renderer_type != RENDERER_BINAURAL_PARAMETRIC_ROOM ) )
         {