diff --git a/ChangeLog b/ChangeLog
index 8ff27cf6..39962ef2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -3,6 +3,8 @@
 	* lib/prototypes.h: Add the dolastlog() prototype.
 	* lib/prototypes.h: Typo: login.c -> loginprompt.c
 	* src/login.c: Remove declaration of dolastlog().
+	* lib/prototypes.h: Include <lastlog.h> for the declaration of
+	struct lastlog.
 
 2008-01-05  Nicolas François  <nicolas.francois@centraliens.net>
 
diff --git a/lib/prototypes.h b/lib/prototypes.h
index b3106a0e..39c1cd57 100644
--- a/lib/prototypes.h
+++ b/lib/prototypes.h
@@ -24,6 +24,7 @@
 #include <pwd.h>
 #include <grp.h>
 #include <shadow.h>
+#include <lastlog.h>
 
 #include "defines.h"