diff --git a/lib_com/options.h b/lib_com/options.h
index e9d887b5eb4c8f37d739186371d05aaa9a5e932d..d8428a0810a3860eaff781509a6a48c99dab5982 100755
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -240,6 +240,7 @@
 #define ENHANCED_STEREO_DMX                             /* Orange : Contribution 48 - Enhanced stereo downmix. */
 
 #define BINAURAL_AUDIO_CMDLINE
+#define FIX_570_TCX_LPC_WRITE                           /* FhG: fix issue 570: LPC bitstream writer in TCX */
 
 /* ################## End DEVELOPMENT switches ######################### */
 /* clang-format on */
diff --git a/lib_enc/ivas_tcx_core_enc.c b/lib_enc/ivas_tcx_core_enc.c
index e334f4d0298b6fc9d00f108b3531f59028e0bacf..9931f1048dfd7372bc7d717a495d0735f71cea70 100644
--- a/lib_enc/ivas_tcx_core_enc.c
+++ b/lib_enc/ivas_tcx_core_enc.c
@@ -392,10 +392,14 @@ void stereo_tcx_core_enc(
      * Write LPC parameters
      *--------------------------------------------------------------------------------*/
 
+#ifndef FIX_570_TCX_LPC_WRITE
     n = st->coder_type; /* IVAS_fmToDo: hack to keep bit-exactness -> TBV */
     st->coder_type = INACTIVE;
+#endif
     writeLPCparam( st, hBstr, param_lpc, bits_param_lpc, no_param_lpc, &total_nbbits );
+#ifndef FIX_570_TCX_LPC_WRITE
     st->coder_type = n;
+#endif
 
     assert( total_nbbits == ( nbits_lpc[0] + nbits_lpc[1] ) );
 #ifdef DEBUG_MODE_TCX