diff --git a/src/theme/book.js b/src/theme/book.js
index 151ed640..e5a02ac4 100644
--- a/src/theme/book.js
+++ b/src/theme/book.js
@@ -51,31 +51,21 @@ $( document ).ready(function() {
     });
 
     // Interesting DOM Elements
-    var html = $("html");
     var sidebar = $("#sidebar");
     var page_wrapper = $("#page-wrapper");
     var content = $("#content");
 
     // Toggle sidebar
-    $("#sidebar-toggle").click(function(event){
-        if ( html.hasClass("sidebar-hidden") ) {
-            html.removeClass("sidebar-hidden").addClass("sidebar-visible");
-            localStorage.setItem('sidebar', 'visible');
-        } else if ( html.hasClass("sidebar-visible") ) {
-            html.removeClass("sidebar-visible").addClass("sidebar-hidden");
-            localStorage.setItem('sidebar', 'hidden');
-        } else {
-            if(sidebar.position().left === 0){
-                html.addClass("sidebar-hidden");
-                localStorage.setItem('sidebar', 'hidden');
-            } else {
-                html.addClass("sidebar-visible");
-                localStorage.setItem('sidebar', 'visible');
-            }
+    $("#sidebar-toggle").click(sidebarToggle);
+
+    // Hide sidebar on section link click if it occupies large space
+    // in relation to the whole screen (phone in portrait)
+    $("#sidebar a").click(function(event){
+        if (sidebar.width() > window.screen.width * 0.4) {
+            sidebarToggle();
         }
     });
 
-
     // Scroll sidebar to current active section
     var activeSection = sidebar.find(".active");
     if(activeSection.length) {
@@ -227,6 +217,25 @@ function showTooltip(elem, msg) {
     elem.setAttribute('class', 'fa fa-copy tooltipped');
 }
 
+function sidebarToggle() {
+    var html = $("html");
+    if ( html.hasClass("sidebar-hidden") ) {
+        html.removeClass("sidebar-hidden").addClass("sidebar-visible");
+        localStorage.setItem('sidebar', 'visible');
+    } else if ( html.hasClass("sidebar-visible") ) {
+        html.removeClass("sidebar-visible").addClass("sidebar-hidden");
+        localStorage.setItem('sidebar', 'hidden');
+    } else {
+        if($("#sidebar").position().left === 0){
+            html.addClass("sidebar-hidden");
+            localStorage.setItem('sidebar', 'hidden');
+        } else {
+            html.addClass("sidebar-visible");
+            localStorage.setItem('sidebar', 'visible');
+        }
+    }
+}
+
 function run_rust_code(code_block) {
     var result_block = code_block.find(".result");
     if(result_block.length === 0) {