diff --git a/lib_dec/fd_cng_dec_fx.c b/lib_dec/fd_cng_dec_fx.c
index b6ba82895d99f166b6cb430f201c5c2ad9ccd3d9..51c2c4643dd4c59eaa05fc34809062ee4bb861ab 100644
--- a/lib_dec/fd_cng_dec_fx.c
+++ b/lib_dec/fd_cng_dec_fx.c
@@ -2800,9 +2800,10 @@ void perform_noise_estimation_dec_ivas_fx(
                 }
                 ELSE
                 {
-                    Copy32( msPeriodog, msNoiseEst, npart );
-                    scale_sig32( &msNoiseEst[npart], sub( NPART_SHAPING, npart ), sub( hFdCngDec->msNoiseEst_exp, hFdCngDec->msPeriodog_exp ) );
-                    hFdCngDec->msNoiseEst_exp = hFdCngDec->msPeriodog_exp;
+                    Word16 tmp = s_max( sub( hFdCngDec->msNoiseEst_exp, getScaleFactor32( msPeriodog, npart ) ), sub( hFdCngDec->msPeriodog_exp, getScaleFactor32( &msNoiseEst[npart], sub( NPART_SHAPING, npart ) ) ) );
+                    Copy_Scale_sig32( msPeriodog, msNoiseEst, npart, sub( hFdCngDec->msPeriodog_exp, tmp ) );
+                    scale_sig32( &msNoiseEst[npart], sub( NPART_SHAPING, npart ), sub( hFdCngDec->msNoiseEst_exp, tmp ) );
+                    hFdCngDec->msNoiseEst_exp = tmp;
                     move16();
                 }