diff --git a/book/en/src/SUMMARY.md b/book/en/src/SUMMARY.md
index 028cb47f795..f128e0e1804 100644
--- a/book/en/src/SUMMARY.md
+++ b/book/en/src/SUMMARY.md
@@ -36,7 +36,7 @@
 ---
 
 - [Under the hood](./internals.md)
-  - [Cortex-M architectures](./internals/targets.md)
+  - [Target architectures](./internals/targets.md)
   <!--- [Interrupt configuration](./internals/interrupt-configuration.md)-->
   <!--- [Non-reentrancy](./internals/non-reentrancy.md)-->
   <!--- [Access control](./internals/access.md)-->