diff --git a/lib_com/options.h b/lib_com/options.h
index 85f0ed654088090f2401b332b246d0267063b567..46e386b5c1a5bfdeac0a311d7a2bc71497cce205 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -94,6 +94,7 @@
 #define FIX1998_APA_EXEC_SCALING                             /* FhG: fix scaling of apa_exec_ivas_fx(); avoid continuously worse scaling with previous data */
 #define FIX2007_BASSPSFILTER_OVERFLOW                        /* FhG: use saturing operator, to avoid overflow in bass_psfilter_fx() */
 
+#define FIX_2009_HIGH_NOISE_FLOOR_FOR_FX_DEC                 /* FhG: Corrected the q_input in the input of generate_masking_noise_dirac_ivas_fx() */
 /* #################### Start BASOP porting switches ############################ */
 
 #define NONBE_1244_FIX_SWB_BWE_MEMORY                   /* VA: issue 1244: fix to SWB BWE memory in case of switching from FB coding - pending a review by Huawei */
diff --git a/lib_rend/ivas_dirac_dec_binaural_functions_fx.c b/lib_rend/ivas_dirac_dec_binaural_functions_fx.c
index be1f5b9ce463ecc7f52917e75533d6099d5ae4b6..bb6cf805115c5d986cd785345558cf00c2532964 100644
--- a/lib_rend/ivas_dirac_dec_binaural_functions_fx.c
+++ b/lib_rend/ivas_dirac_dec_binaural_functions_fx.c
@@ -817,7 +817,11 @@ static void ivas_dirac_dec_binaural_internal_fx(
                                                           slot,
                                                           st_ivas->hSCE[0]->hCoreCoder[0]->cna_dirac_flag && st_ivas->hSCE[0]->hCoreCoder[0]->flag_cna,
                                                           ( st_ivas->hSCE[0]->hCoreCoder[0]->core_brate == FRAME_NO_DATA || st_ivas->hSCE[0]->hCoreCoder[0]->core_brate == SID_2k40 ) && ( st_ivas->hSCE[0]->hCoreCoder[0]->cng_type == FD_CNG ) && st_ivas->hSCE[0]->hCoreCoder[0]->cng_sba_flag,
+#ifdef FIX_2009_HIGH_NOISE_FLOOR_FOR_FX_DEC
+                                                          st_ivas->hTcBuffer->q_tc_fx, &q_cldfb[2][slot] );
+#else
                                                           11, &q_cldfb[2][slot] );
+#endif
 
                     generate_masking_noise_dirac_ivas_fx( st_ivas->hSCE[0]->hCoreCoder[0]->hFdCngDec->hFdCngCom,
                                                           st_ivas->cldfbAnaDec[1], /*nothing will be analyzed, just get cnst*/
@@ -852,11 +856,18 @@ static void ivas_dirac_dec_binaural_internal_fx(
                     {
                         Cldfb_RealBuffer_in_fx[0][slot][b] = Mpy_32_16_1( Cldfb_RealBuffer_in_fx[0][slot][b], 23170 );
                         Cldfb_RealBuffer_in_fx[1][slot][b] = L_add( L_add( Cldfb_RealBuffer_in_fx[0][slot][b], L_shr( Cldfb_RealBuffer_in_fx[1][slot][b], 1 ) ), Cldfb_RealBuffer_in_fx[0][slot][b] );
+#ifdef FIX_2009_HIGH_NOISE_FLOOR_FOR_FX_DEC
+                        Cldfb_RealBuffer_in_fx[0][slot][b] = L_add( Cldfb_RealBuffer_in_fx[0][slot][b], L_shr( Cldfb_RealBuffer_in_fx[2][slot][b], add( sub( q_cldfb[2][slot], q_input ), 6 ) ) );
+#else
                         Cldfb_RealBuffer_in_fx[0][slot][b] = L_add( Cldfb_RealBuffer_in_fx[0][slot][b], L_shr( Cldfb_RealBuffer_in_fx[2][slot][b], 1 ) );
-
+#endif
                         Cldfb_ImagBuffer_in_fx[0][slot][b] = Mpy_32_16_1( Cldfb_ImagBuffer_in_fx[0][slot][b], 23170 );
                         Cldfb_ImagBuffer_in_fx[1][slot][b] = L_add( Cldfb_ImagBuffer_in_fx[0][slot][b], L_shr( Cldfb_ImagBuffer_in_fx[1][slot][b], 1 ) );
+#ifdef FIX_2009_HIGH_NOISE_FLOOR_FOR_FX_DEC
+                        Cldfb_ImagBuffer_in_fx[0][slot][b] = L_add( Cldfb_ImagBuffer_in_fx[0][slot][b], L_shr( Cldfb_ImagBuffer_in_fx[2][slot][b], add( sub( q_cldfb[2][slot], q_input ), 6 ) ) );
+#else
                         Cldfb_ImagBuffer_in_fx[0][slot][b] = L_add( Cldfb_ImagBuffer_in_fx[0][slot][b], L_shr( Cldfb_ImagBuffer_in_fx[2][slot][b], 1 ) );
+#endif
                         move32();
                         move32();
                         move32();