--- alltray-git-180319/src/Application.vala.000	2018-03-19 19:10:47.000000000 -0700
+++ alltray-git-180319/src/Application.vala	2018-03-20 02:53:43.898837674 -0700
@@ -252,11 +252,22 @@
 
     private void update_icon() {
       Gdk.Pixbuf new_icon;
+      unowned string ati = Environment.get_variable ("ALLTRAYICON");
 
-      if(this._usingWindowIcon == true) {
-	new_icon = this._windows.first().data.get_mini_icon();
-      } else {
-	new_icon = this._wnckApp.get_mini_icon();
+      if ((ati != null) && (ati.length > 0))
+      {
+          new_icon = new Gdk.Pixbuf.from_file (ati);
+      }
+      else
+      {
+          if (this._usingWindowIcon == true)
+          {
+              new_icon = this._windows.first().data.get_mini_icon();
+          }
+          else
+          {
+              new_icon = this._wnckApp.get_mini_icon();
+          }
       }
 
       icon_changed(new_icon);