diff --git a/js/reveal.js b/js/reveal.js
index a449e75..ef7ce49 100644
--- a/js/reveal.js
+++ b/js/reveal.js
@@ -3951,11 +3951,6 @@
 			}
 		}
 
-		if( config.navigationMode === 'linear' ) {
-			routes.right = routes.right || routes.down;
-			routes.left = routes.left || routes.up;
-		}
-
 		// Reverse horizontal controls for rtl
 		if( config.rtl ) {
 			var left = routes.left;
@@ -5441,7 +5436,7 @@
 
 				if( deltaX > touch.threshold && Math.abs( deltaX ) > Math.abs( deltaY ) ) {
 					touch.captured = true;
-					if (config.navigationMode === 'linear') {
+					if( config.navigationMode === 'linear' ) {
 						if( config.rtl ) {
 							navigateNext();
 						}
@@ -5455,7 +5450,7 @@
 				}
 				else if( deltaX < -touch.threshold && Math.abs( deltaX ) > Math.abs( deltaY ) ) {
 					touch.captured = true;
-					if (config.navigationMode === 'linear') {
+					if( config.navigationMode === 'linear' ) {
 						if( config.rtl ) {
 							navigatePrev();
 						}
@@ -5469,7 +5464,7 @@
 				}
 				else if( deltaY > touch.threshold ) {
 					touch.captured = true;
-					if (config.navigationMode === 'linear') {
+					if( config.navigationMode === 'linear' ) {
 						navigatePrev();
 					}
 					else {
@@ -5478,7 +5473,7 @@
 				}
 				else if( deltaY < -touch.threshold ) {
 					touch.captured = true;
-					if (config.navigationMode === 'linear') {
+					if( config.navigationMode === 'linear' ) {
 						navigateNext();
 					}
 					else {