diff --git a/lib_com/options.h b/lib_com/options.h
index f6aaeba759675fcca726323c94a1e41ea93b48da..aa3047dffbe4ce27d8316c1078dfaddfc92db671 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -172,7 +172,7 @@
 #define NONBE_1217_OBJ_EDIT_FOA                         /* VA/Nokia: isse 1217: fix crash in object editing to FOA output in ParamISM */
 #define NONBE_1215_FIX_JBM_MAX_SCALING                  /* FhG: issue 1215: Fix assert hit in a specific VoIP decoder config. Caused by integer overflow in max scaling calculation. */
 #define NONBE_FIX_1255_OBJ_EDIT_JBM                     /* VA: issue 1255: restore object editing in JBM */
-
+#define NONBE_FIX_1189_GSC_IVAS_OMASA                   /* VA: Fix for issue 1189: Bitstream desynchornization due to reading/writing of the GSC_IVAS_mode parameter */
 
 /* ##################### End NON-BE switches ########################### */
 
diff --git a/lib_dec/acelp_core_dec.c b/lib_dec/acelp_core_dec.c
index 4ac0e098bebe0dee16617f49b5a868bfdd271ce5..0bba174b7c86a50d36add26f440d896ea88ba5b3 100644
--- a/lib_dec/acelp_core_dec.c
+++ b/lib_dec/acelp_core_dec.c
@@ -483,7 +483,11 @@ ivas_error acelp_core_dec(
 
         if ( st->element_mode > EVS_MONO && st->idchan == 0 && !( st->core_brate == FRAME_NO_DATA || st->core_brate == SID_2k40 ) && !tdm_low_rate_mode )
         {
+#ifdef NONBE_FIX_1189_GSC_IVAS_OMASA
+            if ( st->coder_type == AUDIO || ( st->coder_type == INACTIVE && st->inactive_coder_type_flag ) )
+#else
             if ( st->coder_type == AUDIO || ( st->coder_type == INACTIVE && st->total_brate <= MAX_GSC_INACTIVE_BRATE ) )
+#endif
             {
                 st->GSC_IVAS_mode = get_next_indice( st, 2 );
             }