diff --git a/docs/process/breaking-changes.md b/docs/process/breaking-changes.md
index 820ff3a8ac4..b7023bdf1c4 100644
--- a/docs/process/breaking-changes.md
+++ b/docs/process/breaking-changes.md
@@ -35,7 +35,8 @@ abide by the following basic conditions:
 * Must access libraries via the public API (for example, must not reach into
   the internals of a package located in the `/src/` directory).
 
-* Must not rely on an [experiment flag](experimental-flags.md).
+* Must not rely on an [experiment flag](experimental-flags.md), or depend on
+  libraries or APIs that are documented as being experimental.
 
 * Must not circumvent clear restrictions documented in the public API
   documentation (for example, must not mixin a class clearly documented as