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diff --git a/tc2cfr/Backend.cpp b/tc2cfr/Backend.cpp
index f6c641e..29f690e 100644
--- a/tc2cfr/Backend.cpp
+++ b/tc2cfr/Backend.cpp
@@ -24,6 +24,7 @@
 */
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <math.h>
 
@@ -32,9 +33,11 @@
 
 #include "Backend.h"
 
+/*
 inline int round(double x){
   return (int)(floor(x+0.5));
 }
+*/
 
 inline bool isInt(double x){
   return abs(x-round(x))<=0.0001;