2 files changed, 9 insertions, 0 deletions
diff --git a/lib/utils/navigation.js b/lib/utils/navigation.js
index 21666ad..6912b14 100644
--- a/lib/utils/navigation.js
+++ b/lib/utils/navigation.js
@@ -57,6 +57,7 @@ function navigation(summary, files) {
 
 
         return [current.path, {
+            index: i,
             title: current.title,
             prev: prev,
             next: next,
diff --git a/lib/utils/progress.js b/lib/utils/progress.js
index b66aea9..9669d86 100644
--- a/lib/utils/progress.js
+++ b/lib/utils/progress.js
@@ -7,10 +7,18 @@ var calculProgress = function(navigation, current) {
     var done = true;
 
     var chapters = _.chain(navigation)
+
+    // Transform as array
     .map(function(nav, path) {
         nav.path = path;
         return nav;
     })
+
+    // Sort entries
+    .sortBy(function(nav) {
+        return nav.index;
+    })
+
     .map(function(nav, i) {
         // Calcul percent
         nav.percent = (i * 100) / Math.max((n - 1), 1);