diff --git a/Documentation/Makefile b/Documentation/Makefile
index d3f043f50d..8d405a1433 100644
--- a/Documentation/Makefile
+++ b/Documentation/Makefile
@@ -94,6 +94,7 @@ TECH_DOCS += MyFirstContribution
 TECH_DOCS += MyFirstObjectWalk
 TECH_DOCS += SubmittingPatches
 TECH_DOCS += ToolsForGit
+TECH_DOCS += technical/bitmap-format
 TECH_DOCS += technical/bundle-format
 TECH_DOCS += technical/hash-function-transition
 TECH_DOCS += technical/http-protocol