diff --git a/src/intro/install.md b/src/intro/install.md
index 1b696969..a09cbd58 100644
--- a/src/intro/install.md
+++ b/src/intro/install.md
@@ -16,10 +16,27 @@ rustc 1.31.1 (b6c32da9b 2018-12-18)
 
 For bandwidth and disk usage concerns the default installation only supports
 native compilation. To add cross compilation support for the ARM Cortex-M
-architecture install the following compilation targets.
+architecture choose one of the following compilation targets. Use the last one
+for the STM32F3DISCOVERY board and follow along with the book.
 
+Cortex M0 M0+
 ``` console
-$ rustup target add thumbv6m-none-eabi thumbv7m-none-eabi thumbv7em-none-eabi thumbv7em-none-eabihf
+$ rustup target add thumbv6m-none-eabi
+```
+
+Cortex M3
+``` console
+$ rustup target add thumbv7m-none-eabi
+```
+
+Cortex M4 M7 without FPU
+``` console
+$ rustup target add thumbv7em-none-eabi
+```
+
+Cortex M4 M7 with FPU <-- STM32F3DISCOVERY
+``` console
+$ rustup target add thumbv7em-none-eabihf
 ```
 
 ### `cargo-binutils`