--- a/db/os_map.c
+++ b/db/os_map.c
@@ -31,6 +31,8 @@
 #endif
 
 #include "db_int.h"
+#include "db_page.h"
+#include "db_ext.h"
 #include "os_jump.h"
 
 #ifdef HAVE_MMAP