diff --git a/lib_dec/igf_dec_fx.c b/lib_dec/igf_dec_fx.c
index f44e073a4e983bc11f5bf4851fc4644d074e1a0b..74299beaecd853b52b2914cd436705bac51f95b5 100644
--- a/lib_dec/igf_dec_fx.c
+++ b/lib_dec/igf_dec_fx.c
@@ -4253,10 +4253,10 @@ void IGFDecCopyLPCFlatSpectrum_fx(
 
 
         /* pSpectrumFlat_exp has to be multiplied with 1024 = 2^10 go achive proper gain values */
-        hPrivateData->pSpecFlat_exp = add( pSpectrumFlat_exp, 10 );
+        hPrivateData->pSpecFlat_exp = 30;
         move16();
 
-        Copy32( pSpectrumFlat, hPrivateData->pSpecFlat, hGrid->startLine );
+        Copy_Scale_sig32( pSpectrumFlat, hPrivateData->pSpecFlat, hGrid->startLine, sub( pSpectrumFlat_exp, 20 ) );
     }
 }