diff --git a/lib_dec/ivas_stereo_cng_dec.c b/lib_dec/ivas_stereo_cng_dec.c
index 0c08c549fe6253ccbe0bfcdbb580a087fe975178..0e77aa9e40d2773ed4c0128261e0c2b36b38b941 100644
--- a/lib_dec/ivas_stereo_cng_dec.c
+++ b/lib_dec/ivas_stereo_cng_dec.c
@@ -1174,7 +1174,7 @@ static void stereo_dft_generate_comfort_noise_fx(
             ptr_tmp--;
             *ptr_level = *( ptr_level + 1 );
             move32();
-            lp_noise = L_add( lp_noise, L_shl( *ptr_level--, add( 1, sub( Q6, sub( Q31, hFdCngCom->cngNoiseLevelExp ) ) ) ) );
+            lp_noise = L_add( lp_noise, L_shl( *ptr_level--, 1 ) );
         }
     }
     ELSE
@@ -1266,8 +1266,8 @@ static void stereo_dft_generate_comfort_noise_fx(
         // log10(x) is computed as log2(x) * log10(2)
         // log_lp_noise at this stage is in Q25. where as the structure value is in Q23
         // Hence the 16-bit constant log10(2) will be stored in Q13
-        log_lp_noise = Mpy_32_16_1( log_lp_noise, (Word16) 0x09A2 );
-        st1->lp_noise = L_add( Mpy_32_16_1( st1->lp_noise, (Word16) ( 0x7333 ) ), log_lp_noise );
+        log_lp_noise = Mpy_32_16_1( log_lp_noise, 2466 /* log10(2) in Q13 */ );
+        st1->lp_noise = L_add( Mpy_32_16_1( st1->lp_noise, 29491 /* 0.9f in Q15 */ ), log_lp_noise );
         move32();
     }
     ELSE IF( EQ_16( chan, 0 ) )
@@ -1278,8 +1278,8 @@ static void stereo_dft_generate_comfort_noise_fx(
         // log10(x) is computed as log2(x) * log10(2)
         // log_lp_noise at this stage is in Q25. where as the structure value is in Q23
         // Hence the 16-bit constant log10(2) will be stored in Q13
-        log_lp_noise = Mpy_32_16_1( log_lp_noise, (Word16) 0x09A2 );
-        st->hFdCngDec->lp_noise = L_add( Mpy_32_16_1( st->hFdCngDec->lp_noise, (Word16) ( 0x7333 ) ), log_lp_noise );
+        log_lp_noise = Mpy_32_16_1( log_lp_noise, 2466 /* log10(2) in Q13 */ );
+        st->hFdCngDec->lp_noise = L_add( Mpy_32_16_1( st->hFdCngDec->lp_noise, 29491 /* 0.9f in Q15 */ ), log_lp_noise );
         move32();
         st->lp_noise = st->hFdCngDec->lp_noise;
         move32();