diff --git a/src/Features/CSharp/Portable/Structure/CSharpBlockStructureProvider.cs b/src/Features/CSharp/Portable/Structure/CSharpBlockStructureProvider.cs
index 427b3f89ceee7d462dc3b42055b4803a3ebd6450..827a124def47c0852e84e76dfd88d12ac9971e06 100644
--- a/src/Features/CSharp/Portable/Structure/CSharpBlockStructureProvider.cs
+++ b/src/Features/CSharp/Portable/Structure/CSharpBlockStructureProvider.cs
@@ -42,6 +42,7 @@ internal class CSharpBlockStructureProvider : AbstractBlockStructureProvider
             builder.Add<StructDeclarationSyntax, TypeDeclarationStructureProvider, MetadataAsSource.MetadataTypeDeclarationStructureProvider>();
             builder.Add<SwitchStatementSyntax, SwitchStatementStructureProvider>();
             builder.Add<LiteralExpressionSyntax, StringLiteralExpressionStructureProvider>();
+            builder.Add<InterpolatedStringExpressionSyntax, InterpolatedStringExpressionStructureProvider>();
 
             return builder.ToImmutable();
         }