diff --git a/test/dbus-daemon.c b/test/dbus-daemon.c
index ed10d098..e192c68f 100644
--- a/test/dbus-daemon.c
+++ b/test/dbus-daemon.c
@@ -34,6 +34,7 @@
 #include <string.h>
 
 #ifdef DBUS_WIN
+# include <io.h>
 # include <windows.h>
 #else
 # include <signal.h>
@@ -44,7 +45,7 @@ typedef struct {
     DBusError e;
     GError *ge;
 
-    gint daemon_pid;
+    GPid daemon_pid;
 
     DBusConnection *left_conn;
 
@@ -66,7 +67,7 @@ _assert_no_error (const DBusError *e,
 static gchar *
 spawn_dbus_daemon (gchar *binary,
     gchar *configuration,
-    gint *daemon_pid)
+    GPid *daemon_pid)
 {
   GError *error = NULL;
   GString *address;