diff --git a/lib_enc/cng_enc_fx.c b/lib_enc/cng_enc_fx.c
index b65d414033bfd12e84d19875aa07fbf21b3bfd08..f148d3e4cd2f594f45512f1d31fb2abc4a9f7205 100644
--- a/lib_enc/cng_enc_fx.c
+++ b/lib_enc/cng_enc_fx.c
@@ -1876,7 +1876,7 @@ void CNG_enc_ivas_fx(
     {
         E_LPC_f_lsp_a_conversion( hDtxEnc->lspCNG_fx, Aq, M );
         exp = sub( Q14, norm_s( Aq[0] ) );
-        Scale_sig( Aq, M, sub( Q12, exp ) ); // Q12
+        Scale_sig( Aq, M + 1, sub( Q12, exp ) ); // Q12
     }
 
     tmp_loop = shr( st_fx->L_frame, 6 );
@@ -1986,19 +1986,19 @@ void CNG_enc_ivas_fx(
             move16();
             BREAK;
         case L_FRAME32k:
-            inv_frame_len = ONE_BY_L_FRAME48k_Q31;
+            inv_frame_len = ONE_BY_L_FRAME32k_Q31;
             move16();
             BREAK;
         case L_FRAME16k:
-            inv_frame_len = ONE_BY_L_FRAME48k_Q31;
+            inv_frame_len = ONE_BY_L_FRAME16k_Q31;
             move16();
             BREAK;
         case L_FRAME8k:
-            inv_frame_len = ONE_BY_L_FRAME48k_Q31;
+            inv_frame_len = ONE_BY_L_FRAME8k_Q31;
             move16();
             BREAK;
         case L_FRAME4k:
-            inv_frame_len = ONE_BY_L_FRAME48k_Q31;
+            inv_frame_len = ONE_BY_L_FRAME4k_Q31;
             move16();
             BREAK;
         default: