diff --git a/compiler/rustc_infer/src/infer/opaque_types.rs b/compiler/rustc_infer/src/infer/opaque_types/mod.rs
similarity index 100%
rename from compiler/rustc_infer/src/infer/opaque_types.rs
rename to compiler/rustc_infer/src/infer/opaque_types/mod.rs