diff --git a/src/ui/control/fullscreen_control.js b/src/ui/control/fullscreen_control.js
index b1a7abea4dd..d6fb7bb1203 100644
--- a/src/ui/control/fullscreen_control.js
+++ b/src/ui/control/fullscreen_control.js
@@ -64,7 +64,7 @@ class FullscreenControl {
     _checkFullscreenSupport() {
         return !!(
             window.document.fullscreenEnabled ||
-            (window.document: any).mozFullscreenEnabled ||
+            (window.document: any).mozFullScreenEnabled ||
             (window.document: any).msFullscreenEnabled ||
             (window.document: any).webkitFullscreenEnabled
         );