diff --git a/lime/_backend/html5/HTML5Application.hx b/lime/_backend/html5/HTML5Application.hx
index 952a91ecf..3d91e9735 100644
--- a/lime/_backend/html5/HTML5Application.hx
+++ b/lime/_backend/html5/HTML5Application.hx
@@ -185,11 +185,11 @@ class HTML5Application {
 			
 			// space and arrow keys
 			
-			//switch (event.keyCode) {
-				//
-				//case 32, 37, 38, 39, 40: event.preventDefault ();
-				//
-			//}
+			switch (event.keyCode) {
+				
+				case 32, 37, 38, 39, 40: event.preventDefault ();
+				
+			}
 			
 			var keyCode = cast convertKeyCode (event.keyCode != null ? event.keyCode : event.which);
 			var modifier = (event.shiftKey ? (KeyModifier.SHIFT) : 0) | (event.ctrlKey ? (KeyModifier.CTRL) : 0) | (event.altKey ? (KeyModifier.ALT) : 0) | (event.metaKey ? (KeyModifier.META) : 0);