diff --git a/lib_enc/swb_tbe_enc_fx.c b/lib_enc/swb_tbe_enc_fx.c
index 903f3a46c7f62292b1922a6ff7c7a51398098549..9d0f16ee91b0c1eb8fbef1985c7bd49afa832300 100644
--- a/lib_enc/swb_tbe_enc_fx.c
+++ b/lib_enc/swb_tbe_enc_fx.c
@@ -7547,8 +7547,8 @@ void fb_tbe_enc_ivas_fx(
     hBWE_TD->old_input_fhb_fx_Q = exp_temp;
     move16();
 
-    temp2 = sum2_fx_no_sat( input_fhb, L_FRAME48k / 2 );                                                           // 2*q_input_fhb                                                                                                               /* Q(2*Q_input_fhb-8) */
-    temp2 = W_add( temp2, W_shl( hBWE_TD->prev_fb_energy_fx, sub( q_input_fhb, hBWE_TD->prev_fb_energy_fx_Q ) ) ); // 2*q_input_fhb
+    temp2 = sum2_fx_no_sat( input_fhb, L_FRAME48k / 2 );                                                                     // 2*q_input_fhb                                                                                                               /* Q(2*Q_input_fhb-8) */
+    temp2 = W_add( temp2, W_shl( hBWE_TD->prev_fb_energy_fx, sub( shl( q_input_fhb, 1 ), hBWE_TD->prev_fb_energy_fx_Q ) ) ); // 2*q_input_fhb
 
     temp1 = sum2_fx_no_sat( input_fhb + L_FRAME48k / 2, L_FRAME48k / 2 ); // 2*q_input_fhb
     exp = W_norm( temp1 );
@@ -7605,7 +7605,6 @@ void fb_tbe_enc_ivas_fx(
     {
         push_indice( st->hBstr, IND_FB_SLOPE, idxGain, 4 );
     }
-
     return;
 }
 void tbe_write_bitstream_fx(