diff --git a/compiler/rustc_mir_build/src/thir/pattern/check_match.rs b/compiler/rustc_mir_build/src/thir/pattern/check_match.rs
index f9fe261bcee..97edbd83b89 100644
--- a/compiler/rustc_mir_build/src/thir/pattern/check_match.rs
+++ b/compiler/rustc_mir_build/src/thir/pattern/check_match.rs
@@ -1,5 +1,5 @@
-use super::_match::Usefulness::*;
-use super::_match::{
+use super::usefulness::Usefulness::*;
+use super::usefulness::{
     compute_match_usefulness, expand_pattern, MatchArm, MatchCheckCtxt, UsefulnessReport,
 };
 use super::{PatCtxt, PatKind, PatternError};
diff --git a/compiler/rustc_mir_build/src/thir/pattern/deconstruct_pat.rs b/compiler/rustc_mir_build/src/thir/pattern/deconstruct_pat.rs
index 1ff7ed5d8fd..62b4468eeb3 100644
--- a/compiler/rustc_mir_build/src/thir/pattern/deconstruct_pat.rs
+++ b/compiler/rustc_mir_build/src/thir/pattern/deconstruct_pat.rs
@@ -4,8 +4,8 @@
 use self::Constructor::*;
 use self::SliceKind::*;
 
-use super::_match::{MatchCheckCtxt, PatCtxt};
 use super::compare_const_vals;
+use super::usefulness::{MatchCheckCtxt, PatCtxt};
 use super::{FieldPat, Pat, PatKind, PatRange};
 
 use rustc_data_structures::captures::Captures;
diff --git a/compiler/rustc_mir_build/src/thir/pattern/mod.rs b/compiler/rustc_mir_build/src/thir/pattern/mod.rs
index d14643c44b4..7e9a3a37278 100644
--- a/compiler/rustc_mir_build/src/thir/pattern/mod.rs
+++ b/compiler/rustc_mir_build/src/thir/pattern/mod.rs
@@ -1,9 +1,9 @@
 //! Validation of patterns/matches.
 
-mod _match;
 mod check_match;
 mod const_to_pat;
 mod deconstruct_pat;
+mod usefulness;
 
 pub(crate) use self::check_match::check_match;
 
diff --git a/compiler/rustc_mir_build/src/thir/pattern/_match.rs b/compiler/rustc_mir_build/src/thir/pattern/usefulness.rs
similarity index 100%
rename from compiler/rustc_mir_build/src/thir/pattern/_match.rs
rename to compiler/rustc_mir_build/src/thir/pattern/usefulness.rs