2 files changed, 3 insertions, 4 deletions

diff --git a/crates/hir_ty/src/diagnostics/decl_check.rs b/crates/hir_ty/src/diagnostics/decl_check.rs
index 4c20921e5..901ccc94f 100644
--- a/crates/hir_ty/src/diagnostics/decl_check.rs
+++ b/crates/hir_ty/src/diagnostics/decl_check.rs
@@ -10,7 +10,7 @@
 //! - static items (e.g. `static FOO: u8 = 10;`)
 //! - match arm bindings (e.g. `foo @ Some(_)`)
 
-mod str_helpers;
+mod case_conv;
 
 use hir_def::{
     adt::VariantData,
@@ -29,7 +29,7 @@ use syntax::{
 
 use crate::{
     db::HirDatabase,
-    diagnostics::{decl_check::str_helpers::*, CaseType, IncorrectCase},
+    diagnostics::{decl_check::case_conv::*, CaseType, IncorrectCase},
 };
 
 pub(super) struct DeclValidator<'a, 'b: 'a> {
diff --git a/crates/hir_ty/src/diagnostics/decl_check/str_helpers.rs b/crates/hir_ty/src/diagnostics/decl_check/case_conv.rs
index 2e1468c4c..3800f2a6b 100644
--- a/crates/hir_ty/src/diagnostics/decl_check/str_helpers.rs
+++ b/crates/hir_ty/src/diagnostics/decl_check/case_conv.rs
@@ -136,8 +136,7 @@ pub fn to_upper_snake_case(ident: &str) -> Option<String> {
     }
 
     // Normalize the string from whatever form it's in currently, and then just make it uppercase.
-    let upper_snake_case =
-        stdx::to_lower_snake_case(ident).chars().map(|c| c.to_ascii_uppercase()).collect();
+    let upper_snake_case = stdx::to_upper_snake_case(ident);
 
     if upper_snake_case == ident {
         // While we didn't detect the correct case at the beginning, there