diff --git a/src/ui/control/navigation_control.js b/src/ui/control/navigation_control.js
index c03940f9cbb..395fefd2e45 100644
--- a/src/ui/control/navigation_control.js
+++ b/src/ui/control/navigation_control.js
@@ -46,14 +46,14 @@ class NavigationControl {
         this._container.addEventListener('contextmenu', (e) => e.preventDefault());
 
         if (this.options.showZoom) {
-            this._zoomInButton = this._createButton('mapboxgl-ctrl-icon mapboxgl-ctrl-zoom-in', 'Zoom In', () => this._map.zoomIn());
-            this._zoomOutButton = this._createButton('mapboxgl-ctrl-icon mapboxgl-ctrl-zoom-out', 'Zoom Out', () => this._map.zoomOut());
+            this._zoomInButton = this._createButton('mapboxgl-ctrl-icon mapboxgl-ctrl-zoom-in', 'Zoom in', () => this._map.zoomIn());
+            this._zoomOutButton = this._createButton('mapboxgl-ctrl-icon mapboxgl-ctrl-zoom-out', 'Zoom out', () => this._map.zoomOut());
         }
         if (this.options.showCompass) {
             bindAll([
                 '_rotateCompassArrow'
             ], this);
-            this._compass = this._createButton('mapboxgl-ctrl-icon mapboxgl-ctrl-compass', 'Reset North', () => this._map.resetNorth());
+            this._compass = this._createButton('mapboxgl-ctrl-icon mapboxgl-ctrl-compass', 'Reset bearing to north', () => this._map.resetNorth());
             this._compassArrow = DOM.create('span', 'mapboxgl-ctrl-compass-arrow', this._compass);
         }
     }
@@ -90,6 +90,7 @@ class NavigationControl {
     _createButton(className: string, ariaLabel: string, fn: () => mixed) {
         const a = DOM.create('button', className, this._container);
         a.type = 'button';
+        a.title = ariaLabel;
         a.setAttribute('aria-label', ariaLabel);
         a.addEventListener('click', fn);
         return a;