diff --git a/crates/oxc_semantic/src/builder.rs b/crates/oxc_semantic/src/builder.rs
index f140d0fdc..ad913d4ca 100644
--- a/crates/oxc_semantic/src/builder.rs
+++ b/crates/oxc_semantic/src/builder.rs
@@ -19,7 +19,7 @@ use crate::{
     control_flow::{
         AssignmentValue, ControlFlowGraph, EdgeType, Register, StatementControlFlowType,
     },
-    diagnostics::Redeclaration,
+    diagnostics::redeclaration,
     jsdoc::JSDocBuilder,
     label::LabelBuilder,
     module_record::ModuleRecordBuilder,
@@ -279,7 +279,7 @@ impl<'a> SemanticBuilder<'a> {
         let symbol_id = self.scope.get_binding(scope_id, name)?;
         if report_error && self.symbols.get_flag(symbol_id).intersects(excludes) {
             let symbol_span = self.symbols.get_span(symbol_id);
-            self.error(Redeclaration(CompactStr::from(name), symbol_span, span));
+            self.error(redeclaration(name, symbol_span, span));
         }
         Some(symbol_id)
     }
diff --git a/crates/oxc_semantic/src/checker/javascript.rs b/crates/oxc_semantic/src/checker/javascript.rs
index 9d7bddf96..f66c79578 100644
--- a/crates/oxc_semantic/src/checker/javascript.rs
+++ b/crates/oxc_semantic/src/checker/javascript.rs
@@ -14,7 +14,7 @@ use oxc_syntax::{
 use phf::{phf_set, Set};
 use rustc_hash::FxHashMap;
 
-use crate::{builder::SemanticBuilder, diagnostics::Redeclaration, scope::ScopeFlags, AstNode};
+use crate::{builder::SemanticBuilder, diagnostics::redeclaration, scope::ScopeFlags, AstNode};
 
 pub struct EarlyErrorJavaScript;
 
@@ -131,7 +131,7 @@ fn check_duplicate_class_elements(ctx: &SemanticBuilder<'_>) {
                 };
 
                 if is_duplicate {
-                    ctx.error(Redeclaration(element.name.clone(), prev_element.span, element.span));
+                    ctx.error(redeclaration(&element.name, prev_element.span, element.span));
                 }
             }
         }
@@ -429,8 +429,10 @@ fn check_string_literal(lit: &StringLiteral, ctx: &SemanticBuilder<'_>) {
 }
 
 fn illegal_use_strict(span0: Span) -> OxcDiagnostic {
-    OxcDiagnostic::error("Illegal 'use strict' directive in function with non-simple parameter list")
-        .with_labels([span0.into()])
+    OxcDiagnostic::error(
+        "Illegal 'use strict' directive in function with non-simple parameter list",
+    )
+    .with_labels([span0.into()])
 }
 
 // It is a Syntax Error if FunctionBodyContainsUseStrict of AsyncFunctionBody is true and IsSimpleParameterList of FormalParameters is false.
@@ -454,8 +456,10 @@ fn check_directive(directive: &Directive, ctx: &SemanticBuilder<'_>) {
 }
 
 fn top_level(x0: &str, span1: Span) -> OxcDiagnostic {
-    OxcDiagnostic::error(format!("'{x0}' declaration can only be used at the top level of a module"))
-        .with_labels([span1.into()])
+    OxcDiagnostic::error(format!(
+        "'{x0}' declaration can only be used at the top level of a module"
+    ))
+    .with_labels([span1.into()])
 }
 
 fn module_code(x0: &str, span1: Span) -> OxcDiagnostic {
@@ -613,7 +617,7 @@ fn check_switch_statement<'a>(stmt: &SwitchStatement<'a>, ctx: &SemanticBuilder<
     for case in &stmt.cases {
         if case.test.is_none() {
             if let Some(previous_span) = previous_default {
-                ctx.error(Redeclaration("default".into(), previous_span, case.span));
+                ctx.error(redeclaration("default", previous_span, case.span));
                 break;
             }
             previous_default.replace(case.span);
@@ -720,7 +724,7 @@ fn check_labeled_statement(ctx: &SemanticBuilder) {
         let mut defined = FxHashMap::default();
         for labeled in labels {
             if let Some(span) = defined.get(labeled.name) {
-                ctx.error(Redeclaration(labeled.name.into(), *span, labeled.span));
+                ctx.error(redeclaration(labeled.name, *span, labeled.span));
             } else {
                 defined.insert(labeled.name, labeled.span);
             }
@@ -729,8 +733,10 @@ fn check_labeled_statement(ctx: &SemanticBuilder) {
 }
 
 fn multiple_declaration_in_for_loop_head(x0: &str, span1: Span) -> OxcDiagnostic {
-    OxcDiagnostic::error(format!("Only a single declaration is allowed in a `for...{x0}` statement"))
-        .with_labels([span1.into()])
+    OxcDiagnostic::error(format!(
+        "Only a single declaration is allowed in a `for...{x0}` statement"
+    ))
+    .with_labels([span1.into()])
 }
 
 fn unexpected_initializer_in_for_loop_head(x0: &str, span1: Span) -> OxcDiagnostic {
@@ -1036,7 +1042,7 @@ fn check_object_expression(obj_expr: &ObjectExpression, ctx: &SemanticBuilder<'_
     for prop_name in prop_names {
         if prop_name.0 == "__proto__" {
             if let Some(prev_span) = prev_proto {
-                ctx.error(Redeclaration("__proto__".into(), prev_span, prop_name.1));
+                ctx.error(redeclaration("__proto__", prev_span, prop_name.1));
             }
             prev_proto = Some(prop_name.1);
         }
diff --git a/crates/oxc_semantic/src/checker/typescript.rs b/crates/oxc_semantic/src/checker/typescript.rs
index 179be97aa..ac84137f9 100644
--- a/crates/oxc_semantic/src/checker/typescript.rs
+++ b/crates/oxc_semantic/src/checker/typescript.rs
@@ -5,7 +5,7 @@ use oxc_diagnostics::OxcDiagnostic;
 use oxc_span::{Atom, GetSpan, Span};
 use rustc_hash::FxHashMap;
 
-use crate::{builder::SemanticBuilder, diagnostics::Redeclaration, AstNode};
+use crate::{builder::SemanticBuilder, diagnostics::redeclaration, AstNode};
 
 pub struct EarlyErrorTypeScript;
 
@@ -93,7 +93,7 @@ fn check_duplicate_bound_names<'a, T: BoundNames<'a>>(bound_names: &T, ctx: &Sem
     let mut idents: FxHashMap<Atom<'a>, Span> = FxHashMap::default();
     bound_names.bound_names(&mut |ident| {
         if let Some(old_span) = idents.insert(ident.name.clone(), ident.span) {
-            ctx.error(Redeclaration(ident.name.to_compact_str(), old_span, ident.span));
+            ctx.error(redeclaration(&ident.name, old_span, ident.span));
         }
     });
 }
diff --git a/crates/oxc_semantic/src/diagnostics.rs b/crates/oxc_semantic/src/diagnostics.rs
index ee62d229b..520063ef9 100644
--- a/crates/oxc_semantic/src/diagnostics.rs
+++ b/crates/oxc_semantic/src/diagnostics.rs
@@ -1,14 +1,9 @@
-use oxc_diagnostics::{
-    miette::{self, Diagnostic},
-    thiserror::{self, Error},
-};
-use oxc_span::{CompactStr, Span};
+use oxc_diagnostics::{LabeledSpan, OxcDiagnostic};
+use oxc_span::Span;
 
-#[derive(Debug, Error, Diagnostic)]
-#[error("Identifier `{0}` has already been declared")]
-#[diagnostic()]
-pub struct Redeclaration(
-    pub CompactStr,
-    #[label("`{0}` has already been declared here")] pub Span,
-    #[label("It can not be redeclared here")] pub Span,
-);
+pub fn redeclaration(x0: &str, span1: Span, span2: Span) -> OxcDiagnostic {
+    OxcDiagnostic::error(format!("Identifier `{x0}` has already been declared")).with_labels([
+        LabeledSpan::new_with_span(Some(format!("`{x0}` has already been declared here")), span1),
+        LabeledSpan::new_with_span(Some("It can not be redeclared here".into()), span2),
+    ])
+}