diff --git a/src/lib/libc/include/stdlib.h b/src/lib/libc/include/stdlib.h
index 73d256a..13b4a03 100755
--- a/src/lib/libc/include/stdlib.h
+++ b/src/lib/libc/include/stdlib.h
@@ -24,6 +24,8 @@
 #ifndef _STDLIB_H
 #define _STDLIB_H
 
+#include <sys/types.h>
+
 void exit(int);
 
-#endif
\ No newline at end of file
+#endif