diff --git a/package/base.yaml b/package/base.yaml
index d4fa569..bf914d1 100644
--- a/package/base.yaml
+++ b/package/base.yaml
@@ -94,7 +94,7 @@ script:
     then: 
       - lambda: |-
           id(actual_page) = id(actual_page) - 1;
-          if(id(actual_page) <= 0 {
+          if(id(actual_page) <= 0) {
             id(actual_page) = id(nr_of_pages);
           }
       - display.page.show_previous: main_display