diff --git a/modules/ui/intro/intro.js b/modules/ui/intro/intro.js
index 39ed10db2..bdc85d23d 100644
--- a/modules/ui/intro/intro.js
+++ b/modules/ui/intro/intro.js
@@ -106,15 +106,18 @@ export function uiIntro(context) {
             callback(null, t('intro.graph.countrycode'));
         };
 
+        // Disable the sidebar resizing button
+        d3_selectAll('button.sidebar-toggle').classed('disabled', true);
+
         d3_selectAll('#map .layer-background').style('opacity', 1);
 
         var curtain = uiCurtain();
         selection.call(curtain);
 
-        // store that the user started the walkthrough..
+        // Store that the user started the walkthrough..
         context.storage('walkthrough_started', 'yes');
 
-        // restore previous walkthrough progress..
+        // Restore previous walkthrough progress..
         var storedProgress = context.storage('walkthrough_progress') || '';
         var progress = storedProgress.split(';').filter(Boolean);
 
@@ -133,7 +136,7 @@ export function uiIntro(context) {
                             .classed('next', true);
                     }
 
-                    // store walkthrough progress..
+                    // Store walkthrough progress..
                     progress.push(chapter);
                     context.storage('walkthrough_progress', _uniq(progress).join(';'));
                 });
@@ -141,11 +144,11 @@ export function uiIntro(context) {
         });
 
         chapters[chapters.length - 1].on('startEditing', function() {
-            // store walkthrough progress..
+            // Store walkthrough progress..
             progress.push('startEditing');
             context.storage('walkthrough_progress', _uniq(progress).join(';'));
 
-            // store if walkthrough is completed..
+            // Store if walkthrough is completed..
             var incomplete = _difference(chapterFlow, progress);
             if (!incomplete.length) {
                 context.storage('walkthrough_completed', 'yes');
@@ -154,6 +157,7 @@ export function uiIntro(context) {
             curtain.remove();
             navwrap.remove();
             d3_selectAll('#map .layer-background').style('opacity', opacity);
+            d3_selectAll('button.sidebar-toggle').classed('disabled', false);
             if (osm) { osm.toggle(true).reset().caches(caches); }
             context.history().reset().merge(_values(baseEntities));
             context.background().baseLayerSource(background);
diff --git a/modules/ui/sidebar.js b/modules/ui/sidebar.js
index cf5064bdc..c678a44ba 100644
--- a/modules/ui/sidebar.js
+++ b/modules/ui/sidebar.js
@@ -258,6 +258,9 @@ export function uiSidebar(context) {
                 e.preventDefault();
             }
 
+            // Don't allow sidebar to toggle when the user is in the walkthrough.
+            if (context.inIntro()) return;
+
             var isCollapsed = selection.classed('collapsed');
             var isCollapsing = !isCollapsed;
             var xMarginProperty = textDirection === 'rtl' ? 'margin-right' : 'margin-left';