diff --git a/gtk/gtkiconhelper.c b/gtk/gtkiconhelper.c
index ef05f83c2e..2ee91e8971 100644
--- a/gtk/gtkiconhelper.c
+++ b/gtk/gtkiconhelper.c
@@ -49,7 +49,7 @@ struct _GtkIconHelperPrivate {
 
 G_DEFINE_TYPE_WITH_PRIVATE (GtkIconHelper, gtk_icon_helper, GTK_TYPE_CSS_GADGET)
 
-void
+static void
 gtk_icon_helper_invalidate (GtkIconHelper *self)
 {
   if (self->priv->rendered_surface != NULL)
diff --git a/gtk/gtkiconhelperprivate.h b/gtk/gtkiconhelperprivate.h
index 185c2715de..e1dbd09c4e 100644
--- a/gtk/gtkiconhelperprivate.h
+++ b/gtk/gtkiconhelperprivate.h
@@ -138,8 +138,6 @@ gboolean _gtk_icon_helper_get_force_scale_pixbuf (GtkIconHelper *self);
 void     _gtk_icon_helper_set_force_scale_pixbuf (GtkIconHelper *self,
                                                   gboolean       force_scale);
 
-void      gtk_icon_helper_invalidate (GtkIconHelper *self);
-
 void      gtk_icon_helper_invalidate_for_change (GtkIconHelper     *self,
                                                  GtkCssStyleChange *change);