diff --git a/src/ConfigurationProcessor.Core/Implementation/ObjectArgumentValue.cs b/src/ConfigurationProcessor.Core/Implementation/ObjectArgumentValue.cs
index 22765ba..7dbc3f6 100644
--- a/src/ConfigurationProcessor.Core/Implementation/ObjectArgumentValue.cs
+++ b/src/ConfigurationProcessor.Core/Implementation/ObjectArgumentValue.cs
@@ -28,6 +28,12 @@ public object ConvertTo(MethodInfo configurationMethod, Type toType, ResolutionC
             return section;
          }
 
+         // this can enter here when string is null
+         if (toType == typeof(string))
+         {
+            return section.Value;
+         }
+
          if (toType.IsArray)
          {
             return CreateArray();