diff --git a/Cargo.toml b/Cargo.toml
index 5d0c825a8..d73f8d2ba 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -39,6 +39,9 @@ members = ["time-benchmarks", "time-macros", "time-macros-impl"]
 [target.'cfg(windows)'.dependencies]
 winapi = { version = "0.3.9", features = ["minwinbase", "minwindef", "timezoneapi"], optional = true }
 
+[target.'cfg(unsound_local_offset)'.dependencies]
+libc = "0.2.81"
+
 [dev-dependencies]
 rand = { version = "0.7.3", default-features = false }
 serde_json = "1.0.59"
diff --git a/src/lib.rs b/src/lib.rs
index b8ad59ba4..8b13df567 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -53,6 +53,14 @@
 //! - `quickcheck` (_implicitly enables `rand`_)
 //!
 //!   Enables [quickcheck](https://docs.rs/quickcheck) support for all types except [`Instant`].
+//!
+//! One pseudo-feature flag that is only available to end users is the `unsound_local_offset` cfg.
+//! As the name indicates, using the feature is unsound, and [may cause unexpected segmentation
+//! faults](https://github.com/time-rs/time/issues/293). Unlike other flags, this is deliberately
+//! only available to end users; this is to ensure that a user doesn't have unsound behavior without
+//! knowing it. To enable this behavior, you must use `RUSTFLAGS="--cfg unsound_local_offset" cargo
+//! build` or similar. Note: This flag is _not tested anywhere_, including in the regular test of
+//! the powerset of all feature flags. Use at your own risk.
 
 #![cfg_attr(__time_03_docs, feature(doc_cfg))]
 #![cfg_attr(__time_03_docs, deny(broken_intra_doc_links))]
diff --git a/src/utc_offset.rs b/src/utc_offset.rs
index 0029b52cd..906c948e5 100644
--- a/src/utc_offset.rs
+++ b/src/utc_offset.rs
@@ -224,13 +224,16 @@ impl Display for UtcOffset {
 #[cfg_attr(__time_03_docs, doc(cfg(feature = "local-offset")))]
 #[allow(clippy::too_many_lines, clippy::missing_const_for_fn)]
 fn local_offset_at(datetime: OffsetDateTime) -> Option<UtcOffset> {
-    #[cfg(target_family = "unix")]
+    // See #293 for details.
+    #[cfg(all(target_family = "unix", not(unsound_local_offset)))]
     {
-        // See #293 for details.
         let _ = datetime;
         None
-
-        /*
+    }
+    // Let a user explicitly opt-in to unsound behavior. As this is not done via feature flags, it
+    // can only be enabled by the end user. It must be explicitly passed on each compilation.
+    #[cfg(all(target_family = "unix", unsound_local_offset))]
+    {
         use core::{convert::TryInto, mem::MaybeUninit};
 
         /// Convert the given Unix timestamp to a `libc::tm`. Returns `None` on any error.
@@ -319,7 +322,6 @@ fn local_offset_at(datetime: OffsetDateTime) -> Option<UtcOffset> {
             )
             .ok()
         }
-        */
     }
     #[cfg(target_family = "windows")]
     {