diff --git a/SUMMARY.md b/SUMMARY.md
index edf0fa6..1df78aa 100644
--- a/SUMMARY.md
+++ b/SUMMARY.md
@@ -16,6 +16,7 @@
     * [Paging](Theory/Paging.md)
     * [Elf64](Theory/ELF.md)
     * [Per-CPU variables](Theory/per-cpu.md)
+    * [Lockdep]()
     * [CPUID]()
     * [MSR]()
 * [Misc]()