diff --git a/gtk/inspector/misc-info.c b/gtk/inspector/misc-info.c
index c3496b88a3..6138f627e9 100644
--- a/gtk/inspector/misc-info.c
+++ b/gtk/inspector/misc-info.c
@@ -354,7 +354,7 @@ update_info (gpointer data)
       frame = gdk_frame_clock_get_frame_counter (clock);
       frame_time = gdk_frame_clock_get_frame_time (clock);
 
-      tmp = g_strdup_printf ("%ld", frame);
+      tmp = g_strdup_printf ("%"G_GINT64_FORMAT, frame);
       gtk_label_set_label (GTK_LABEL (sl->priv->framecount), tmp);
       g_free (tmp);