diff --git a/include/wx/gtk/private/gtk3-compat.h b/include/wx/gtk/private/gtk3-compat.h
new file mode 100644
index 0000000000..2aa415d544
--- /dev/null
+++ b/include/wx/gtk/private/gtk3-compat.h
@@ -0,0 +1,35 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        wx/gtk/private/gtk3-compat.h
+// Purpose:     Compatibility code for older GTK+ 3 versions
+// Author:      Paul Cornett
+// Created:     2015-10-10
+// Copyright:   (c) 2015 Paul Cornett
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_GTK_PRIVATE_COMPAT3_H_
+#define _WX_GTK_PRIVATE_COMPAT3_H_
+
+#if defined(__WXGTK3__)
+
+wxGCC_WARNING_SUPPRESS(deprecated-declarations)
+
+// ----------------------------------------------------------------------------
+// the following were introduced in GTK+ 3.12
+
+static inline void wx_gtk_widget_set_margin_start(GtkWidget* widget, gint margin)
+{
+    gtk_widget_set_margin_left(widget, margin);
+}
+#define gtk_widget_set_margin_start wx_gtk_widget_set_margin_start
+
+static inline void wx_gtk_widget_set_margin_end(GtkWidget* widget, gint margin)
+{
+    gtk_widget_set_margin_right(widget, margin);
+}
+#define gtk_widget_set_margin_end wx_gtk_widget_set_margin_end
+
+wxGCC_WARNING_RESTORE()
+
+#endif // __WXGTK3__
+#endif // _WX_GTK_PRIVATE_COMPAT3_H_