diff --git a/src/Features/Core/Portable/Completion/Providers/AbstractAwaitCompletionProvider.cs b/src/Features/Core/Portable/Completion/Providers/AbstractAwaitCompletionProvider.cs
index cdc1e803e442c..4d81d2c136d3a 100644
--- a/src/Features/Core/Portable/Completion/Providers/AbstractAwaitCompletionProvider.cs
+++ b/src/Features/Core/Portable/Completion/Providers/AbstractAwaitCompletionProvider.cs
@@ -10,6 +10,7 @@
 using Microsoft.CodeAnalysis.Editing;
 using Microsoft.CodeAnalysis.LanguageService;
 using Microsoft.CodeAnalysis.PooledObjects;
+using Microsoft.CodeAnalysis.Shared.Collections;
 using Microsoft.CodeAnalysis.Shared.Extensions;
 using Microsoft.CodeAnalysis.Shared.Extensions.ContextQuery;
 using Microsoft.CodeAnalysis.Text;