diff --git a/StyleCop.Analyzers/StyleCop.Analyzers.CodeFixes/LayoutRules/SA1500CodeFixProvider.cs b/StyleCop.Analyzers/StyleCop.Analyzers.CodeFixes/LayoutRules/SA1500CodeFixProvider.cs
index 2ab1bc062..b16c739be 100644
--- a/StyleCop.Analyzers/StyleCop.Analyzers.CodeFixes/LayoutRules/SA1500CodeFixProvider.cs
+++ b/StyleCop.Analyzers/StyleCop.Analyzers.CodeFixes/LayoutRules/SA1500CodeFixProvider.cs
@@ -18,6 +18,7 @@ namespace StyleCop.Analyzers.LayoutRules
     using Microsoft.CodeAnalysis.CSharp;
     using Microsoft.CodeAnalysis.Text;
     using StyleCop.Analyzers.Helpers;
+    using StyleCop.Analyzers.Lightup;
     using StyleCop.Analyzers.Settings.ObjectModel;
 
     /// <summary>
@@ -165,6 +166,7 @@ private static bool IsAccessorWithSingleLineBlock(SyntaxToken previousToken, Syn
             {
             case SyntaxKind.GetKeyword:
             case SyntaxKind.SetKeyword:
+            case SyntaxKindEx.InitKeyword:
             case SyntaxKind.AddKeyword:
             case SyntaxKind.RemoveKeyword:
                 break;
diff --git a/StyleCop.Analyzers/StyleCop.Analyzers.Test.CSharp9/LayoutRules/SA1500CSharp9UnitTests.cs b/StyleCop.Analyzers/StyleCop.Analyzers.Test.CSharp9/LayoutRules/SA1500CSharp9UnitTests.cs
index 28c07a6d9..019ec036e 100644
--- a/StyleCop.Analyzers/StyleCop.Analyzers.Test.CSharp9/LayoutRules/SA1500CSharp9UnitTests.cs
+++ b/StyleCop.Analyzers/StyleCop.Analyzers.Test.CSharp9/LayoutRules/SA1500CSharp9UnitTests.cs
@@ -93,5 +93,49 @@ public async Task TestMultiLineRecordWithParameterAsync(string keyword)
                 FixedCode = testCode,
             }.RunAsync(CancellationToken.None).ConfigureAwait(false);
         }
+
+        [Fact]
+        [WorkItem(3667, "https://github.com/DotNetAnalyzers/StyleCopAnalyzers/issues/3667")]
+        public async Task TestInitAccessorAsync()
+        {
+            var testCode = @"
+class TestClass
+{
+    int Property1
+    {
+        init
+        [|{|] }
+    }
+
+    int Property2
+    {
+        init [|{|]
+        }
+    }
+}";
+
+            var fixedCode = @"
+class TestClass
+{
+    int Property1
+    {
+        init { }
+    }
+
+    int Property2
+    {
+        init
+        {
+        }
+    }
+}";
+
+            await new CSharpTest
+            {
+                ReferenceAssemblies = ReferenceAssemblies.Net.Net50,
+                TestCode = testCode,
+                FixedCode = fixedCode,
+            }.RunAsync(CancellationToken.None).ConfigureAwait(false);
+        }
     }
 }
diff --git a/StyleCop.Analyzers/StyleCop.Analyzers/LayoutRules/SA1500BracesForMultiLineStatementsMustNotShareLine.cs b/StyleCop.Analyzers/StyleCop.Analyzers/LayoutRules/SA1500BracesForMultiLineStatementsMustNotShareLine.cs
index 67b3b671a..dee2b8846 100644
--- a/StyleCop.Analyzers/StyleCop.Analyzers/LayoutRules/SA1500BracesForMultiLineStatementsMustNotShareLine.cs
+++ b/StyleCop.Analyzers/StyleCop.Analyzers/LayoutRules/SA1500BracesForMultiLineStatementsMustNotShareLine.cs
@@ -219,6 +219,7 @@ private static void CheckBraces(SyntaxNodeAnalysisContext context, StyleCopSetti
                     {
                     case SyntaxKind.GetAccessorDeclaration:
                     case SyntaxKind.SetAccessorDeclaration:
+                    case SyntaxKindEx.InitAccessorDeclaration:
                     case SyntaxKind.AddAccessorDeclaration:
                     case SyntaxKind.RemoveAccessorDeclaration:
                     case SyntaxKind.UnknownAccessorDeclaration:
diff --git a/StyleCop.Analyzers/StyleCop.Analyzers/Lightup/SyntaxKindEx.cs b/StyleCop.Analyzers/StyleCop.Analyzers/Lightup/SyntaxKindEx.cs
index 62b06c867..ecb9f398b 100644
--- a/StyleCop.Analyzers/StyleCop.Analyzers/Lightup/SyntaxKindEx.cs
+++ b/StyleCop.Analyzers/StyleCop.Analyzers/Lightup/SyntaxKindEx.cs
@@ -12,6 +12,7 @@ internal static class SyntaxKindEx
         public const SyntaxKind OrKeyword = (SyntaxKind)8438;
         public const SyntaxKind AndKeyword = (SyntaxKind)8439;
         public const SyntaxKind NotKeyword = (SyntaxKind)8440;
+        public const SyntaxKind InitKeyword = (SyntaxKind)8443;
         public const SyntaxKind ManagedKeyword = (SyntaxKind)8445;
         public const SyntaxKind UnmanagedKeyword = (SyntaxKind)8446;
         public const SyntaxKind RequiredKeyword = (SyntaxKind)8447;