diff --git a/lib_com/options.h b/lib_com/options.h
index 4fd97b2d45f7c8d9c559d9b18e697255dd4615e8..a0c7f4f3f1d68281475c6ac5f56b54abcfdf0d08 100755
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -130,7 +130,8 @@
 #define NONBE_FIX_947_STEREO_DMX_EVS_PHA                      /* Orange: Fix issues on PHA */
 #ifdef NONBE_FIX_947_STEREO_DMX_EVS_PHA
 #define NONBE_FIX_947_STEREO_DMX_FADOPT                       /* Orange: Fading optimisation */  
-#endif     
+#endif
+#define FIX_1003_PARAMISM_BINAURAL_RECONFIG_USAN        /* FhG: fix for #1003: fix USAN caused by ParamISM reconfig                    */
 
 /* #################### End BASOP porting switches ############################ */
 
diff --git a/lib_dec/ivas_ism_dec_fx.c b/lib_dec/ivas_ism_dec_fx.c
index 18c6953f282aaab2cb794776bdea986e0c5aafe9..a4294558efce18b1b524f4c29b8a3afb79742811 100644
--- a/lib_dec/ivas_ism_dec_fx.c
+++ b/lib_dec/ivas_ism_dec_fx.c
@@ -369,6 +369,7 @@ static ivas_error ivas_ism_bitrate_switching_dec_fx(
         tc_nchan_full_new = tc_nchan_tc_new;
         move16();
 
+#ifndef FIX_1003_PARAMISM_BINAURAL_RECONFIG_USAN
         test();
         test();
         IF( EQ_32( st_ivas->renderer_type, RENDERER_BINAURAL_PARAMETRIC ) || EQ_32( st_ivas->renderer_type, RENDERER_BINAURAL_PARAMETRIC_ROOM ) || EQ_32( st_ivas->renderer_type, RENDERER_STEREO_PARAMETRIC ) )
@@ -379,6 +380,7 @@ static ivas_error ivas_ism_bitrate_switching_dec_fx(
             move16();
         }
 
+#endif
         test();
         test();
         test();