diff --git a/src/Features/Core/Portable/Completion/CompletionHelperServiceFactory.cs b/src/Features/Core/Portable/Completion/CompletionHelperServiceFactory.cs
index 9980f8441e6eebcbdafd86458a5a157d90b0dc2c..9d76d69c441a9f7eebd1f281438b885c66d4a548 100644
--- a/src/Features/Core/Portable/Completion/CompletionHelperServiceFactory.cs
+++ b/src/Features/Core/Portable/Completion/CompletionHelperServiceFactory.cs
@@ -43,7 +43,9 @@ public CompletionHelper GetCompletionHelper(Document document)
                     }
 
                     var syntaxFacts = document.GetLanguageService<ISyntaxFactsService>();
-                    return syntaxFacts.IsCaseSensitive
+                    var caseSensitive = syntaxFacts?.IsCaseSensitive ?? true;
+
+                    return caseSensitive
                         ? this._caseSensitiveInstance
                         : this._caseInsensitiveInstance;
                 }