diff --git a/js/ui/boxpointer.js b/js/ui/boxpointer.js
index 1523ef650..979e2d147 100644
--- a/js/ui/boxpointer.js
+++ b/js/ui/boxpointer.js
@@ -329,7 +329,7 @@ BoxPointer.prototype = {
         // We also want to keep it onscreen, and separated from the
         // edge by the same distance as the main part of the box is
         // separated from its sourceActor
-        let primary = Main.layoutManager.primaryMonitor;
+        let monitor = Main.layoutManager.findMonitorForActor(sourceActor);
         let themeNode = this.actor.get_theme_node();
         let borderWidth = themeNode.get_length('-arrow-border-width');
         let arrowBase = themeNode.get_length('-arrow-base');
@@ -364,8 +364,8 @@ BoxPointer.prototype = {
         case St.Side.BOTTOM:
             resX = sourceCenterX - (halfMargin + (natWidth - margin) * alignment);
 
-            resX = Math.max(resX, primary.x + 10);
-            resX = Math.min(resX, primary.x + primary.width - (10 + natWidth));
+            resX = Math.max(resX, monitor.x + 10);
+            resX = Math.min(resX, monitor.x + monitor.width - (10 + natWidth));
             this.setArrowOrigin(sourceCenterX - resX);
             break;
 
@@ -373,8 +373,8 @@ BoxPointer.prototype = {
         case St.Side.RIGHT:
             resY = sourceCenterY - (halfMargin + (natHeight - margin) * alignment);
 
-            resY = Math.max(resY, primary.y + 10);
-            resY = Math.min(resY, primary.y + primary.height - (10 + natHeight));
+            resY = Math.max(resY, monitor.y + 10);
+            resY = Math.min(resY, monitor.y + monitor.height - (10 + natHeight));
 
             this.setArrowOrigin(sourceCenterY - resY);
             break;
diff --git a/js/ui/layout.js b/js/ui/layout.js
index d473ae09c..f21fcca30 100644
--- a/js/ui/layout.js
+++ b/js/ui/layout.js
@@ -369,6 +369,10 @@ LayoutManager.prototype = {
     // Removes @actor from the chrome
     removeChrome: function(actor) {
         this._chrome.removeActor(actor);
+    },
+
+    findMonitorForActor: function(actor) {
+        return this._chrome.findMonitorForActor(actor);
     }
 };
 Signals.addSignalMethods(LayoutManager.prototype);
@@ -700,7 +704,7 @@ Chrome.prototype = {
             else if (this._inOverview)
                 visible = true;
             else if (!actorData.visibleInFullscreen &&
-                     this._findMonitorForActor(actorData.actor).inFullscreen)
+                     this.findMonitorForActor(actorData.actor).inFullscreen)
                 visible = false;
             else
                 visible = true;
@@ -762,7 +766,7 @@ Chrome.prototype = {
 
     // This call guarantees that we return some monitor to simplify usage of it
     // In practice all tracked actors should be visible on some monitor anyway
-    _findMonitorForActor: function(actor) {
+    findMonitorForActor: function(actor) {
         let [x, y] = actor.get_transformed_position();
         let [w, h] = actor.get_transformed_size();
         let monitor = this._findMonitorForRect(x, y, w, h);