diff --git a/SUMMARY.md b/SUMMARY.md
index 87aae65..c9c5ccc 100644
--- a/SUMMARY.md
+++ b/SUMMARY.md
@@ -26,7 +26,7 @@
     * [Handling Non-Maskable interrupts](interrupts/interrupts-6.md)
     * [Dive into external hardware interrupts](interrupts/interrupts-7.md)
     * [Initialization of external hardware interrupts structures](interrupts/interrupts-8.md)
-    * [Softirq, Tasklets and Workqueues](interrupts/interrupts-8.md)
+    * [Softirq, Tasklets and Workqueues](interrupts/interrupts-9.md)
 * [Memory management](mm/README.md)
     * [Memblock](mm/linux-mm-1.md)
     * [Fixmaps and ioremap](mm/linux-mm-2.md)