diff --git a/src/engine/gnc-book.h b/src/engine/gnc-book.h
index 411ec4d247..6c11add274 100644
--- a/src/engine/gnc-book.h
+++ b/src/engine/gnc-book.h
@@ -33,6 +33,8 @@
 #ifndef GNC_BOOK_H
 #define GNC_BOOK_H
 
+#include <glib.h>
+
 #include "GNCId.h"
 #include "kvp_frame.h"
 
@@ -42,6 +44,9 @@
  */
 typedef struct gnc_book_struct       GNCBook;
                                                                                 
+/** GList of GNCBook */
+typedef GList                        BookList;
+
 /** Allocate, initialise and return a new GNCBook.  The new book will
     contain a newly allocated AccountGroup */
 GNCBook * gnc_book_new (void);
diff --git a/src/engine/gnc-engine.h b/src/engine/gnc-engine.h
index 2529784be4..52a651e67a 100644
--- a/src/engine/gnc-engine.h
+++ b/src/engine/gnc-engine.h
@@ -103,8 +103,6 @@ typedef struct gnc_lot_struct        GNCLot;
 /** GList of Account */
 typedef GList                  AccountList;
 /** GList of GNCBook */
-typedef GList                  BookList;
-/** GList of GNCLot */
 typedef GList                  LotList;
 /** GList of Split */
 typedef GList                  SplitList;