diff --git a/include/Database/database.h b/include/Database/database.h
index 6745585..cd688d2 100644
--- a/include/Database/database.h
+++ b/include/Database/database.h
@@ -19,6 +19,7 @@
 # define LIBDATABASE_DATABASE_DATABASE_H
 
 # include <stdarg.h>
+# include <stdint.h>
 # include <System.h>
 
 
@@ -49,7 +50,7 @@ typedef struct _DatabasePluginDefinition
 	DatabasePlugin * (*init)(Config * config, char const * section);
 	void (*destroy)(DatabasePlugin * plugin);
 	/* accessors */
-	int (*get_last_id)(DatabasePlugin * plugin);
+	int64_t (*get_last_id)(DatabasePlugin * plugin);
 	/* useful */
 	int (*query)(DatabasePlugin * plugin, char const * query,
 			DatabaseCallback callback, void * data);
@@ -72,7 +73,7 @@ Database * database_new(char const * engine, Config * config,
 void database_delete(Database * database);
 
 /* accessors */
-int database_get_last_id(Database * database);
+int64_t database_get_last_id(Database * database);
 
 /* useful */
 DatabaseStatement * database_prepare_new(
diff --git a/src/database.c b/src/database.c
index 8d378e0..7bf5bf2 100644
--- a/src/database.c
+++ b/src/database.c
@@ -68,7 +68,7 @@ void database_delete(Database * database)
 
 /* accessors */
 /* database_get_last_id */
-int database_get_last_id(Database * database)
+int64_t database_get_last_id(Database * database)
 {
 	return database->dplugin->get_last_id(database->database);
 }
diff --git a/src/engines/pdo.c b/src/engines/pdo.c
index bfae8b2..983f397 100644
--- a/src/engines/pdo.c
+++ b/src/engines/pdo.c
@@ -56,7 +56,7 @@ typedef struct _DatabaseStatement
 static PDO * _pdo_init(Config * config, char const * section);
 static void _pdo_destroy(PDO * pdo);
 
-static int _pdo_get_last_id(PDO * pdo);
+static int64_t _pdo_get_last_id(PDO * pdo);
 
 static int _pdo_query(PDO * pdo, char const * query, DatabaseCallback callback,
 		void * data);
@@ -203,7 +203,7 @@ static void _pdo_destroy(PDO * pdo)
 
 /* accessors */
 /* _pdo_get_last_id */
-static int _pdo_get_last_id(PDO * pdo)
+static int64_t _pdo_get_last_id(PDO * pdo)
 {
 	return pdo->dplugin->get_last_id(pdo->database);
 }
diff --git a/src/engines/pgsql.c b/src/engines/pgsql.c
index 1595e0e..cbb5a4e 100644
--- a/src/engines/pgsql.c
+++ b/src/engines/pgsql.c
@@ -55,7 +55,7 @@ static int _pgsql_process(PgSQL * pgsql, PGresult * res,
 static PgSQL * _pgsql_init(Config * config, char const * section);
 static void _pgsql_destroy(PgSQL * pgsql);
 
-static int _pgsql_get_last_id(PgSQL * pgsql);
+static int64_t _pgsql_get_last_id(PgSQL * pgsql);
 
 static int _pgsql_query(PgSQL * pgsql, char const * query,
 		DatabaseCallback callback, void * data);
@@ -148,7 +148,7 @@ static void _pgsql_destroy(PgSQL * pgsql)
 
 /* accessors */
 /* pgsql_get_last_id */
-static int _pgsql_get_last_id(PgSQL * pgsql)
+static int64_t _pgsql_get_last_id(PgSQL * pgsql)
 {
 	/* FIXME use currval() of the relevant instead */
 	if(pgsql->last == InvalidOid)
diff --git a/src/engines/sqlite2.c b/src/engines/sqlite2.c
index 5100c82..e3d2c30 100644
--- a/src/engines/sqlite2.c
+++ b/src/engines/sqlite2.c
@@ -46,7 +46,7 @@ typedef struct _DatabaseStatement
 static SQLite2 * _sqlite2_init(Config * config, char const * section);
 static void _sqlite2_destroy(SQLite2 * pgsql);
 
-static int _sqlite2_get_last_id(SQLite2 * pgsql);
+static int64_t _sqlite2_get_last_id(SQLite2 * pgsql);
 
 static int _sqlite2_query(SQLite2 * pgsql, char const * query,
 		DatabaseCallback callback, void * data);
@@ -116,7 +116,7 @@ static void _sqlite2_destroy(SQLite2 * sqlite)
 
 /* accessors */
 /* _sqlite2_get_last_id */
-static int _sqlite2_get_last_id(SQLite2 * sqlite)
+static int64_t _sqlite2_get_last_id(SQLite2 * sqlite)
 {
 	/* FIXME really implement */
 	return -1;
diff --git a/src/engines/sqlite3.c b/src/engines/sqlite3.c
index 774afd4..292650c 100644
--- a/src/engines/sqlite3.c
+++ b/src/engines/sqlite3.c
@@ -46,7 +46,7 @@ typedef struct _DatabaseStatement
 static SQLite3 * _sqlite3_init(Config * config, char const * section);
 static void _sqlite3_destroy(SQLite3 * sqlite3);
 
-static int _sqlite3_get_last_id(SQLite3 * sqlite3);
+static int64_t _sqlite3_get_last_id(SQLite3 * sqlite3);
 
 static int _sqlite3_query(SQLite3 * sqlite3, char const * query,
 		DatabaseCallback callback, void * data);
@@ -115,7 +115,7 @@ static void _sqlite3_destroy(SQLite3 * sqlite3)
 
 /* accessors */
 /* _sqlite3_get_last_id */
-static int _sqlite3_get_last_id(SQLite3 * sqlite3)
+static int64_t _sqlite3_get_last_id(SQLite3 * sqlite3)
 {
 	/* XXX returns an int64_t */
 	return sqlite3_last_insert_rowid(sqlite3->handle);
diff --git a/src/engines/template.c b/src/engines/template.c
index a033c3f..6f8f047 100644
--- a/src/engines/template.c
+++ b/src/engines/template.c
@@ -45,7 +45,7 @@ typedef struct _DatabaseStatement
 static Template * _template_init(Config * config, char const * section);
 static void _template_destroy(Template * pgsql);
 
-static int _template_get_last_id(Template * pgsql);
+static int64_t _template_get_last_id(Template * pgsql);
 
 static int _template_query(Template * pgsql, char const * query,
 		DatabaseCallback callback, void * data);
@@ -97,7 +97,7 @@ static void _template_destroy(Template * template)
 
 /* accessors */
 /* _template_get_last_id */
-static int _template_get_last_id(Template * template)
+static int64_t _template_get_last_id(Template * template)
 {
 	/* FIXME really implement */
 	return -1;