diff --git a/lib_rend/ivas_efap_fx.c b/lib_rend/ivas_efap_fx.c
index 4fb88643bb143d6c704e885a0fcd4e0c3f0b4702..fbcfdfe77cbc4cfe42131768b1c48e0667820f51 100644
--- a/lib_rend/ivas_efap_fx.c
+++ b/lib_rend/ivas_efap_fx.c
@@ -2490,7 +2490,8 @@ static Word16 in_tri_fx(
     Word32 tmpDot1[2], tmpDot2[2];
     Word32 matInv[2][2];
     Word32 invFactor;
-    Word16 tmp16, tmp_e;
+    Word16 tmp_e;
+    Word32 tmp32;
     Word64 S[2];
     /* Threshold adjusted */
     Word64 thresh_int = 35184640; // 1e-6f in Q45
@@ -2520,8 +2521,8 @@ static Word16 in_tri_fx(
     }
 
     /* invFactor = 1.f / invFactor; */
-    tmp16 = BASOP_Util_Divide3232_Scale( ONE_IN_Q13, invFactor, &tmp_e ); /*15-tmp_e*/
-    invFactor = L_shl_sat( tmp16, add( Q16, tmp_e ) );                    /* Q31 */
+    tmp32 = BASOP_Util_Divide3232_Scale_newton( ONE_IN_Q13, invFactor, &tmp_e ); /*31-tmp_e*/
+    invFactor = L_shl_sat( tmp32, tmp_e );                                       /* Q31 */
 
     Word16 invFactor_exp = norm_l( invFactor );
     invFactor = L_shl( invFactor, invFactor_exp ); // 31+invFactor_exp