diff --git a/Loop.cpp b/Loop.cpp
index 98015e2..fdba249 100644
--- a/Loop.cpp
+++ b/Loop.cpp
@@ -15,6 +15,7 @@
  */
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <fcntl.h>
 #include <unistd.h>
 #include <errno.h>
@@ -22,6 +23,7 @@
 
 #include <sys/types.h>
 #include <sys/stat.h>
+#include <sys/ioctl.h>
 
 #include <linux/kdev_t.h>