diff --git a/src/lib.rs b/src/lib.rs
index 5bff557..83626db 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -4,6 +4,9 @@
 //! the [`raw_cpuid`](raw_cpuid) crate. It is a goal to support other architectures; PRs are
 //! welcome!
 //!
+//! Note that the library will still compile and work on non x86 architectures, but the result of
+//! all the cache queries will be `None`.
+//!
 //! Check the [Intel 64 and IA-32 Architectures Software Developers Manual](https://software.intel.com/sites/default/files/managed/39/c5/325462-sdm-vol-1-2abcd-3abcd.pdf)
 //! for more information on the `CPUID` instruction.