diff --git a/lib_rend/ivas_dirac_output_synthesis_dec.c b/lib_rend/ivas_dirac_output_synthesis_dec.c
index 54ff2943952f2381af341ff2f5b00a6340647759..d9377b5c04af2eeb5fc953ee36347426e46d73cd 100644
--- a/lib_rend/ivas_dirac_output_synthesis_dec.c
+++ b/lib_rend/ivas_dirac_output_synthesis_dec.c
@@ -926,14 +926,14 @@ void ivas_dirac_dec_output_synthesis_process_slot_fx(
                                 b = BASOP_Util_Divide3232_Scale( reference_power[k + num_freq_bands], reference_power[k + ( ch_idx + 1 ) * num_freq_bands], &b_exp ); /*q(15-b_exp)*/
                             }
                         }
-                        c = L_add( ONE_IN_Q29 /*1 Q29*/, Mpy_32_16_1( L_sub( h_dirac_output_synthesis_params->diffuse_compensation_factor_decorr_fx, ONE_IN_Q29 /*1 Q29*/ ), 5461 ) ); /*Diffuseness modellling nrg compensation*/ /* 1.0 / 6.0  = 5461 in Q15*/ /*Q29*/
+                        c = Madd_32_16( ONE_IN_Q27 /*1 Q27*/, L_sub( h_dirac_output_synthesis_params->diffuse_compensation_factor_fx, ONE_IN_Q27 /*1 Q27*/ ), 5461 ); /*Diffuseness modellling nrg compensation*/ /* 1.0 / 6.0  = 5461 in Q15*/ /*Q27*/
 
                         mpy_a_a_b = Mpy_32_32( a, Mpy_32_16_1( a, b ) );                                           // Q = (h_dirac_output_synthesis_state->q_direct_responses + (15 - b_exp) - 15) + (h_dirac_output_synthesis_state->q_direct_responses) - 31
                         mpy_diff_aab = Mpy_32_32( L_sub( L_shl( 1, q_diffuseness ), diffuseness[k] ), mpy_a_a_b ); // Q = 2*(h_dirac_output_synthesis_state->q_direct_responses) - b_exp - 31 + q_diffuseness -31
-                        mpy_diff_c = Mpy_32_32( diffuseness[k], c );                                               // Q = q_diffuseness - 2
+                        mpy_diff_c = Mpy_32_32( diffuseness[k], c );                                               // Q = q_diffuseness - 4
 
                         q_diff_aab = add( h_dirac_output_synthesis_state->direct_responses_q + sub( sub( 15, b_exp ), 15 ), add( sub( h_dirac_output_synthesis_state->direct_responses_q, 31 ), sub( q_diffuseness, 31 ) ) );
-                        q_diff_c = sub( q_diffuseness, 2 );
+                        q_diff_c = sub( q_diffuseness, 4 );
 
                         test();
                         IF( mpy_diff_c != 0 && mpy_diff_aab != 0 )