diff --git a/include/uapi/linux/agpgart.h b/include/uapi/linux/agpgart.h
index 4e828cf487bc..f5251045181a 100644
--- a/include/uapi/linux/agpgart.h
+++ b/include/uapi/linux/agpgart.h
@@ -52,6 +52,7 @@
 
 #ifndef __KERNEL__
 #include <linux/types.h>
+#include <stdlib.h>
 
 struct agp_version {
 	__u16 major;