diff --git a/views_geojson.module b/views_geojson.module
index e77d83e..ef1afe3 100644
--- a/views_geojson.module
+++ b/views_geojson.module
@@ -221,6 +221,12 @@ function _views_geojson_render_fields($view, $row, $index) {
     }
   }
 
+  // Let modules modify the data.
+  foreach (module_implements('views_geojson_render_fields_alter') as $module) {
+    $function = $module . '_views_geojson_render_fields_alter';
+    $function($feature, $view, $row, $index);
+  }
+
   return $feature;
 }