diff --git a/implementation_section_index.yml b/implementation_section_index.yml
index 1158e1c..a7b40f6 100644
--- a/implementation_section_index.yml
+++ b/implementation_section_index.yml
@@ -262,6 +262,7 @@ Health:
     - Immunization (EPI) Big Catch-Up:
       - OVERVIEW: '@github(dhis2-metadata/IMM_BCU, docs/overview.md, master)'
       - Design: '@github(dhis2-metadata/IMM_BCU, docs/imm_bcu-design.md, master)'
+      - BCU Backlog Harmonization: '@github(dhis2-metadata/IMM_BCU, docs/imm_bcu-backlog-rtm.md, master)'
       - Installation: '@github(dhis2-metadata/IMM_BCU, docs/imm_bcu-installation.md, master)'
       - Release Note: '@github(dhis2-metadata/IMM_BCU, docs/release_note.md, master)'
     - Immunization Campaigns: