diff --git a/src/Compilers/Core/Portable/Diagnostic/Diagnostic.cs b/src/Compilers/Core/Portable/Diagnostic/Diagnostic.cs
index 9c2961177b6a2..13de48438b9b8 100644
--- a/src/Compilers/Core/Portable/Diagnostic/Diagnostic.cs
+++ b/src/Compilers/Core/Portable/Diagnostic/Diagnostic.cs
@@ -269,6 +269,7 @@ public bool IsWarningAsError
 
         /// <summary>
         /// Gets property bag for the diagnostic. it will return <see cref="ImmutableDictionary{TKey, TValue}.Empty"/> if there is no entry.
+        /// This can be used to put diagnostic specific information you want to pass around. for example, to corresponding fixer.
         /// </summary>
         public virtual ImmutableDictionary<string, string> Properties { get { return ImmutableDictionary<string, string>.Empty; } }
 
diff --git a/src/Features/Core/Diagnostics/EngineV1/DiagnosticIncrementalAnalyzer.cs b/src/Features/Core/Diagnostics/EngineV1/DiagnosticIncrementalAnalyzer.cs
index b40a7f9bc0326..1baac931431b9 100644
--- a/src/Features/Core/Diagnostics/EngineV1/DiagnosticIncrementalAnalyzer.cs
+++ b/src/Features/Core/Diagnostics/EngineV1/DiagnosticIncrementalAnalyzer.cs
@@ -771,7 +771,7 @@ private DiagnosticData UpdatePosition(DiagnosticData diagnostic, SyntaxTree tree
                 diagnostic.IsEnabledByDefault,
                 diagnostic.WarningLevel,
                 diagnostic.CustomTags,
-                    diagnostic.Properties,
+                diagnostic.Properties,
                 diagnostic.Workspace,
                 diagnostic.ProjectId,
                 diagnostic.DocumentId,