diff --git a/web_widget_x2many_2d_matrix/README.rst b/web_widget_x2many_2d_matrix/README.rst
index a22f8e00..377291d9 100644
--- a/web_widget_x2many_2d_matrix/README.rst
+++ b/web_widget_x2many_2d_matrix/README.rst
@@ -28,6 +28,7 @@ result could look like this:
 The beauty of this is that you have an arbitrary amount of columns with this
 widget, trying to get this in standard x2many lists involves some quite ugly
 hacks.
+Note: The order of axis values depends on their order in the matrix you provide.
 
 Usage
 =====
diff --git a/web_widget_x2many_2d_matrix/static/src/js/web_widget_x2many_2d_matrix.js b/web_widget_x2many_2d_matrix/static/src/js/web_widget_x2many_2d_matrix.js
index 88ba1745..e438c47e 100644
--- a/web_widget_x2many_2d_matrix/static/src/js/web_widget_x2many_2d_matrix.js
+++ b/web_widget_x2many_2d_matrix/static/src/js/web_widget_x2many_2d_matrix.js
@@ -14,6 +14,8 @@ openerp.web_widget_x2many_2d_matrix = function(instance)
         // those will be filled with rows from the dataset
         by_x_axis: {},
         by_y_axis: {},
+        by_x_axis_sorted: [],
+        by_y_axis_sorted: [],
         by_id: {},
         // configuration values
         field_x_axis: 'x',
@@ -76,6 +78,8 @@ openerp.web_widget_x2many_2d_matrix = function(instance)
             var self = this,
                 result = this._super.apply(this, arguments);
 
+            self.by_x_axis_sorted = []
+            self.by_y_axis_sorted = []
             self.by_x_axis = {};
             self.by_y_axis = {};
             self.by_id = {};
@@ -206,6 +210,10 @@ openerp.web_widget_x2many_2d_matrix = function(instance)
                 }
                 return true;
             });
+            if(this.by_x_axis_sorted.indexOf(x) == -1)
+                this.by_x_axis_sorted.push(x)
+            if(this.by_y_axis_sorted.indexOf(y) == -1)
+                this.by_y_axis_sorted.push(y)
             this.by_x_axis[x] = this.by_x_axis[x] || {};
             this.by_y_axis[y] = this.by_y_axis[y] || {};
             this.by_x_axis[x][y] = row;
@@ -216,13 +224,13 @@ openerp.web_widget_x2many_2d_matrix = function(instance)
         // get x axis values in the correct order
         get_x_axis_values: function()
         {
-            return _.keys(this.by_x_axis);
+            return this.by_x_axis_sorted
         },
 
         // get y axis values in the correct order
         get_y_axis_values: function()
         {
-            return _.keys(this.by_y_axis);
+            return this.by_y_axis_sorted
         },
 
         // get the label for a value on the x axis