diff --git a/include/asm-um/page.h b/include/asm-um/page.h
index 8e310d8..4b424c7 100644
--- a/include/asm-um/page.h
+++ b/include/asm-um/page.h
@@ -9,6 +9,7 @@
 
 struct page;
 
+#include <linux/types.h>
 #include <asm/vm-flags.h>
 
 /* PAGE_SHIFT determines the page size */