diff --git a/lib_com/tools_fx.c b/lib_com/tools_fx.c
index 88f0a896ffc944d9596d73499328dd149cccb83d..3015cdf21eb2afd5b11dbd36b9ea110591d68a8a 100644
--- a/lib_com/tools_fx.c
+++ b/lib_com/tools_fx.c
@@ -3519,7 +3519,7 @@ Word16 erb_diff_search_fx( Word16 *prev_erb, const Word16 *curr_erb, Word16 *dif
         Lacc = L_deposit_l( 0 );
         FOR( i = 0; i < cb_dim; i++ )
         {
-            IF( add( cb_fx[j * cb_dim + i], prev_erb[i + offset] ) < 0 )
+            IF( add_sat( cb_fx[j * cb_dim + i], prev_erb[i + offset] ) < 0 )
             {
                 Ltemp1 = L_mult( curr_erb[i + offset], curr_erb[i + offset] ); /* Q27 */
                 dh = extract_h( Ltemp1 );
diff --git a/lib_enc/fd_cng_enc_fx.c b/lib_enc/fd_cng_enc_fx.c
index a2644946b5c62e1e662841d5ba13095f9a6f42ce..8ef56f72fd37cb8c210377ed7437c3a45cb15cbc 100644
--- a/lib_enc/fd_cng_enc_fx.c
+++ b/lib_enc/fd_cng_enc_fx.c
@@ -2128,7 +2128,7 @@ Word16 cng_energy_fx(
             L_tmp = L_mult0( tmp16, tmp16 );
             pt_res++;
             tmp16 = shl( *pt_res, scale );
-            L_tmp = L_mac0( L_tmp, tmp16, tmp16 ); /* 2*(Q_new+scale) */
+            L_tmp = L_mac0_sat( L_tmp, tmp16, tmp16 ); /* 2*(Q_new+scale) */
             pt_res++;
             L_ener = L_add( L_ener, L_shr( L_tmp, 7 ) ); /* 2*(Q_new+scale)+1, divide by L_frame done here */
         }
diff --git a/lib_enc/spec_flatness_fx.c b/lib_enc/spec_flatness_fx.c
index 271f7ba1b3ed974d0d1b8239c68c123e6386bf24..2ee10bf068b1469a7a2e455367b9d106b52b8123 100644
--- a/lib_enc/spec_flatness_fx.c
+++ b/lib_enc/spec_flatness_fx.c
@@ -133,7 +133,7 @@ void spec_flatness_fx(
     SFM_Qtmp = sub( SFM_Qtmp, SPEC_AMP_Q );
     SFM_Qtmp = sub( SFM_Qtmp, SFM_Q );
 
-    sSFM[0] = add( mult( sSFM[0], 0x6ccc ), shr( mult( SFM, 0x1333 ), SFM_Qtmp ) );
+    sSFM[0] = add_sat( mult( sSFM[0], 0x6ccc ), shr( mult( SFM, 0x1333 ), SFM_Qtmp ) );
     move16();
 
     /*sSFM2*/