diff --git a/lib_dec/dec_uv_fx.c b/lib_dec/dec_uv_fx.c
index ffb49be38ac379865dbcfd897ab7458a1e9d73e8..aa898956a106198302bdc046458327e8f84766cf 100644
--- a/lib_dec/dec_uv_fx.c
+++ b/lib_dec/dec_uv_fx.c
@@ -255,9 +255,9 @@ void decod_unvoiced_ivas_fx(
         Word16 tmp_idx;
         tmp_idx = 0;
         move16();
-        if ( i_subfr_fx != 0 )
+        IF( i_subfr_fx != 0 )
         {
-            idiv1616( i_subfr_fx, L_SUBFR );
+            tmp_idx = idiv1616( i_subfr_fx, L_SUBFR );
         }
         voice_factors_fx[tmp_idx] = 0;
         move16();