diff --git a/lib_com/options.h b/lib_com/options.h
index 6fd5c97296f9d7eb963d5149838a57b3e3ecda31..bc577060baeaa074a29318e4e64c857681d87122 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -204,9 +204,10 @@
 #define NONBE_FIX_951_MCMASA_5MS_RENDERING                    /* Nokia: issue #951: Differences for 5ms and 20ms rendering for McMASA at 13.2kbps to BINAURAL */
 
 
-#define NONBE_FIX_979_OSBA_STEREO_5MS                    /* FhG : issue #979 : 5ms and 20ms output different for OSBA and stereo */
-#define FIX_983_DISC_ISM_DIGEST_NUM_OBJS                 /* FhG: issue #983: the discrete ISM digest function uses the wrong number of objects */
+#define NONBE_FIX_979_OSBA_STEREO_5MS                   /* FhG : issue #979 : 5ms and 20ms output different for OSBA and stereo */
+#define FIX_983_DISC_ISM_DIGEST_NUM_OBJS                /* FhG: issue #983: the discrete ISM digest function uses the wrong number of objects */
 #define FIX_966_VAR_OVERFLOW_IN_HARM_MODEL_ARI          /* FhG: fix and undef behaviour bug in the harmonic TCX model arithmetic coder */
+#define NONBE_FIX_974_OSBA_JBM_MONO_RS_USAN             /* FhG : issue #974: usan in mono and stereo output in OSBA JBM RS */
 
 
 /* #################### End BASOP porting switches ############################ */
diff --git a/lib_dec/ivas_sba_dec.c b/lib_dec/ivas_sba_dec.c
index e3df315e0a664f90111e14e3475c3f622c1d9626..5619ee2b591f60cf56b7dfac155e26d6823d4dd5 100644
--- a/lib_dec/ivas_sba_dec.c
+++ b/lib_dec/ivas_sba_dec.c
@@ -254,7 +254,11 @@ ivas_error ivas_sba_dec_reconfigure(
     }
 
     /* save old */
+#ifdef NONBE_FIX_974_OSBA_JBM_MONO_RS_USAN
+    if ( ism_mode_old != ISM_SBA_MODE_DISC && st_ivas->hTcBuffer->tc_buffer_mode != TC_BUFFER_MODE_BUFFER )
+#else
     if ( ism_mode_old != ISM_SBA_MODE_DISC )
+#endif
     {
         if ( st_ivas->hDirAC == NULL && st_ivas->hSpar != NULL )
         {