diff --git a/crates/wasmtime/src/lib.rs b/crates/wasmtime/src/lib.rs
index 12dd72b456..8b8a74c508 100644
--- a/crates/wasmtime/src/lib.rs
+++ b/crates/wasmtime/src/lib.rs
@@ -172,6 +172,12 @@
 //! * `vtune` - Not enabled by default, this feature compiles in support for
 //!   supporting VTune profiling of JIT code.
 //!
+//! * `uffd` - Not enabled by default. This feature enables `userfaultfd` support
+//!   when using the pooling instance allocator. As handling page faults in userspace
+//!   comes with a performance penalty, this feature should only be enabled when kernel
+//!   lock contention is hampering multithreading throughput. This feature is only
+//!   supported on Linux and requires a Linux kernel version 4.11 or higher.
+//!
 //! ## Examples
 //!
 //! In addition to the examples below be sure to check out the [online embedding