diff --git a/diesel/src/expression/mod.rs b/diesel/src/expression/mod.rs
index f54d5244a470..d1469569db0f 100644
--- a/diesel/src/expression/mod.rs
+++ b/diesel/src/expression/mod.rs
@@ -26,10 +26,7 @@ pub(crate) mod assume_not_null;
 pub(crate) mod bound;
 mod coerce;
 pub(crate) mod count;
-#[cfg(not(feature = "i-implement-a-third-party-backend-and-opt-into-breaking-changes"))]
 pub(crate) mod exists;
-#[cfg(feature = "i-implement-a-third-party-backend-and-opt-into-breaking-changes")]
-pub mod exists;
 pub(crate) mod grouped;
 pub(crate) mod helper_types;
 mod not;