signal 'render' is invalid for instance GtkGLArea

[MauriceGit]

Hello,

when trying to connect a GtkGLArea widget to the 'render' signal I get the below warning:

(gtkAction:5142): GLib-GObject-WARNING **: /build/glib2.0-b4FPyK/glib2.0-2.48.2/./gobject/gsignal.c:2517: signal 'render' is invalid for instance '0x1ffc8a0' of type 'GtkGLArea'

My code is fairly simple for this. Can someone help me out here?

drawArea := gtkgl.NewGLArea([]int{gtkgl.ATTR_RGBA})
drawArea.Connect("render", func() {
    fmt.Println("render")
})

Thanks Maurice