diff --git a/idxcr.c b/idxcr.c
index 9947660..6dbef17 100644
--- a/idxcr.c
+++ b/idxcr.c
@@ -26,12 +26,16 @@
 #define _FILE_OFFSET_BITS 64
 #include <stdlib.h>
 #include <string.h>
-#include <malloc.h>
 #include <stdio.h>
 #include <math.h>
 #include <limits.h> 
 #include <getopt.h>
 #include <sys/stat.h>
+#ifdef __APPLE__
+#include <sys/malloc.h>
+#else
+#include <malloc.h>
+#endif
 
 #include "conf.h"
 #define VINT_IN