diff --git a/src/shared/Z.EF.Plus.Audit.Shared/AuditConfiguration/FormatValue.cs b/src/shared/Z.EF.Plus.Audit.Shared/AuditConfiguration/FormatValue.cs
index 5c8933a2..afa715f4 100644
--- a/src/shared/Z.EF.Plus.Audit.Shared/AuditConfiguration/FormatValue.cs
+++ b/src/shared/Z.EF.Plus.Audit.Shared/AuditConfiguration/FormatValue.cs
@@ -38,7 +38,11 @@ public string FormatValue(object entity, string propertyName, object currentValu
         {
             if (EntityValueFormatters.Count > 0)
             {
+#if EF5 || EF6
+                var type = ObjectContext.GetObjectType(entity.GetType());
+#elif EFCORE
                 var type = entity.GetType();
+#endif
                 var key = string.Concat(type.FullName, ";", propertyName);
                 Func<object, object> formatter;
 
@@ -69,4 +73,4 @@ public string FormatValue(object entity, string propertyName, object currentValu
             return currentValue != null && currentValue != DBNull.Value ? currentValue.ToString() : null;
         }
     }
-}
\ No newline at end of file
+}