diff --git a/lib_enc/acelp_enc_util_fx.c b/lib_enc/acelp_enc_util_fx.c
index 26ca2a020123a1c560ef400954049903ec854b0a..cd93c7f13973c4ee3e1c3b801b96fba2483e925d 100644
--- a/lib_enc/acelp_enc_util_fx.c
+++ b/lib_enc/acelp_enc_util_fx.c
@@ -6,7 +6,6 @@
 #include <stdint.h>
 #include <assert.h>
 #include "options.h"
-//#include "prot_fx.h"
 #include "basop_util.h"
 #include "cnst.h"
 #include "prot_fx.h"     /* Function prototypes                    */
@@ -176,30 +175,6 @@ void E_ACELP_conv(
     }
 }
 
-void E_ACELP_conv_ivas_fx(
-    const Word16 xn2[], /* i    Qnew - 1*/
-    const Word16 h2[],  /* i    Q12*/
-    Word16 cn2[]        /* o    Qnew*/
-)
-{
-    Word16 i, k;
-    Word32 L_tmp;
-
-    FOR( k = 0; k < L_SUBFR; k++ )
-    {
-        /*cn2[k] = xn2[k];     */
-        Word64 L_tmp_64;
-        L_tmp_64 = W_deposit32_l( L_mult0( xn2[k], 0x800 ) ); /* Qnew -1 + 12  */
-        FOR( i = 0; i < k; i++ )
-        {
-            /*cn2[k]-=cn2[i]*h2[k-i];*/
-            L_tmp_64 = W_msu0_16_16( L_tmp_64, cn2[i], h2[k - i] ); /*Qnew + 11*/
-        }
-        L_tmp = W_sat_l( L_tmp_64 );                    /* Qnew + 11 */
-        cn2[k] = round_fx_sat( L_shl_sat( L_tmp, 5 ) ); /* Qnew*/
-        move16();
-    }
-}
 void E_ACELP_build_code(
     Word16 nb_pulse,       /* i        Q0*/
     const Word16 codvec[], /* i        Q0*/