diff --git a/lib_com/options.h b/lib_com/options.h
index 42a41806b2b0252798aaffbb5b635199f7a136b0..6a82ff168e26d68aafa735ba747406a67b7fa9f6 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -172,6 +172,7 @@
 /* any switch which is non-be wrt. TS 26.258 V3.0 */
 #define FIX_1465_SWB_TBE_RANDOM_VECTOR_CREATION         /* Dolby: issue 1465: Fix constant in create_random_vector() to allow more reliable fixed point port */
 
+#define FIX_1283_STEREO_DFT_COLLAPSE                    /* FhG: issue 1283: fix for critical issue with DFT stereo core coder */
 
 #define FIX_1500_ISM_MD_DTX                             /* VA: float issue 1500: fix ISM elevation metadata smoothing in DTX */
 
diff --git a/lib_enc/cod_tcx.c b/lib_enc/cod_tcx.c
index ad070b9d3db7a98394c904ebd0f214f56c3231f5..3d0036ea4d35f730110ddf06ef23210cd5030e21 100644
--- a/lib_enc/cod_tcx.c
+++ b/lib_enc/cod_tcx.c
@@ -728,7 +728,11 @@ void ShapeSpectrum(
         hTcxCfg->SFM2 = SFM_Cal( spectrum, min( 200, L_frame ) );
     }
 
+#ifndef FIX_1283_STEREO_DFT_COLLAPSE
     if ( ( total_brate <= ACELP_13k20 && st->bwidth == SWB ) )
+#else
+    if ( ( total_brate <= ACELP_13k20 && st->bwidth == SWB ) || ( st->element_brate <= IVAS_16k4 && st->element_mode == IVAS_CPE_DFT && st->bwidth == SWB ) )
+#endif
     {
         max_low_pre = 0.f;
         for ( i = 0; i < L_frame; i++ )
@@ -772,8 +776,12 @@ void ShapeSpectrum(
         v_multc( spectrum + L_frame, 1.f / gainlpc[FDNS_NPTS - 1], spectrum + L_frame, L_spec - L_frame );
     }
 
-    /* reduce the peaks in the IGF region, to make life of the core-coder easier... */
+/* reduce the peaks in the IGF region, to make life of the core-coder easier... */
+#ifndef FIX_1283_STEREO_DFT_COLLAPSE
     if ( total_brate <= ACELP_13k20 && st->bwidth == SWB )
+#else
+    if ( ( total_brate <= ACELP_13k20 && st->bwidth == SWB ) || ( st->element_brate <= IVAS_16k4 && st->element_mode == IVAS_CPE_DFT && st->bwidth == SWB ) )
+#endif
     {
         int16_t dist_low, dist_high;
         float max_fac;
diff --git a/lib_enc/lib_enc.c b/lib_enc/lib_enc.c
index 603463b23cc2ef1441fb14dbfa67c8f413db03d1..569be1b8ca7e71dcc9a1e64e3d5f9cb896410eb2 100644
--- a/lib_enc/lib_enc.c
+++ b/lib_enc/lib_enc.c
@@ -1315,6 +1315,9 @@ ivas_error IVAS_ENC_EncodeFrameToSerial(
     if ( hEncoderConfig->ivas_format == MONO_FORMAT ) /* EVS mono */
     {
         hCoreCoder->total_brate = hEncoderConfig->ivas_total_brate; /* needed in case of bitrate switching */
+#ifdef FIX_1283_STEREO_DFT_COLLAPSE
+        hCoreCoder->element_brate = hEncoderConfig->ivas_total_brate; /* needed in checks in core-coder functions other than mono*/
+#endif
 #ifdef DEBUGGING
         hCoreCoder->id_element = 0;
 #endif