diff --git a/src/conditional-compilation.md b/src/conditional-compilation.md
index c3a36effe..e724b21e2 100644
--- a/src/conditional-compilation.md
+++ b/src/conditional-compilation.md
@@ -129,6 +129,7 @@ Example values:
 * `"dragonfly"`
 * `"openbsd"`
 * `"netbsd"`
+* `"none"` (typical for embedded targets)
 
 ### `target_family`