diff --git a/lib_dec/FEC_scale_syn_fx.c b/lib_dec/FEC_scale_syn_fx.c
index 1de1666127177ca4bc8a343fa38c8aa2b40aa39c..21a589c56bb746729643a20e3a6b7bf35a1996b6 100644
--- a/lib_dec/FEC_scale_syn_fx.c
+++ b/lib_dec/FEC_scale_syn_fx.c
@@ -790,15 +790,16 @@ void FEC_scale_syn_ivas_fx(
     /*-----------------------------------------------------------------*
      * Find the energy/gain at the end of the frame
      *-----------------------------------------------------------------*/
-    IF( LT_16( getScaleFactor16( synth, L_frame ), 2 ) )
+    tmp = sub( 3, getScaleFactor16( synth, L_frame ) );
+    IF( tmp > 0 )
     {
-        Scale_sig( synth, L_frame, -1 );
-        frame_ener_fx( L_frame, clas, synth, pitch[sub( shr( L_frame, 6 ), 1 )], &L_enr2 /*Q0*/, 1, sub( Q_syn, 1 ), 3, 0 );
-        Scale_sig( synth, L_frame, 1 );
+        Word16 synth_tmp[L_FRAME16k];
+        Copy_Scale_sig( synth, synth_tmp, L_frame, -tmp ); // Q_synth - tmp
+        frame_ener_fx( L_frame, clas, synth_tmp, pitch[L_frame / L_SUBFR - 1], &L_enr2 /*Q0*/, 1, sub( Q_syn, tmp ), 3, 0 );
     }
     ELSE
     {
-        frame_ener_fx( L_frame, clas, synth, pitch[sub( shr( L_frame, 6 ), 1 )], &L_enr2 /*Q0*/, 1, Q_syn, 3, 0 );
+        frame_ener_fx( L_frame, clas, synth, pitch[L_frame / L_SUBFR - 1], &L_enr2 /*Q0*/, 1, Q_syn, 3, 0 );
     }
 
     test();