diff --git a/ChangeLog.md b/ChangeLog.md
index 07a4855a4d..17087977aa 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -10,7 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 - Fix analyzer [RCS1090](https://josefpihrt.github.io/docs/roslynator/analyzers/RCS1090) ([PR](https://github.com/dotnet/roslynator/pull/1566))
-- [CLI] Fix command `generate-doc` ([PR](https://github.com/dotnet/roslynator/pull/1568))
+- [CLI] Fix command `generate-doc` ([PR](https://github.com/dotnet/roslynator/pull/1568), [PR](https://github.com/dotnet/roslynator/pull/1570))
 
 ### Change
 
diff --git a/src/Documentation/DocumentationWriter.cs b/src/Documentation/DocumentationWriter.cs
index cb46e37d01..4c76aec13c 100644
--- a/src/Documentation/DocumentationWriter.cs
+++ b/src/Documentation/DocumentationWriter.cs
@@ -1530,7 +1530,7 @@ void WriteConstantValue(IFieldSymbol fieldSymbol)
 
             if (fieldSymbol.Type.TypeKind == TypeKind.Enum)
             {
-                OneOrMany<EnumFieldSymbolInfo>.Enumerator en = EnumUtility.GetConstituentFields(fieldSymbol.ConstantValue, fieldSymbol.ContainingType).GetEnumerator();
+                OneOrMany<EnumFieldSymbolInfo>.Enumerator en = EnumUtility.GetConstituentFields(fieldSymbol.ConstantValue, (INamedTypeSymbol)fieldSymbol.Type).GetEnumerator();
 
                 if (en.MoveNext())
                 {