diff --git a/examples/mraa-gpio.c b/examples/mraa-gpio.c
index 5451578..93651c0 100644
--- a/examples/mraa-gpio.c
+++ b/examples/mraa-gpio.c
@@ -23,6 +23,7 @@
  */
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <unistd.h>