diff --git a/src/tests/efl_mono/Errors.cs b/src/tests/efl_mono/Errors.cs
index ee22ff9619..94156e9a16 100644
--- a/src/tests/efl_mono/Errors.cs
+++ b/src/tests/efl_mono/Errors.cs
@@ -37,7 +37,9 @@ class TestEolianError
 {
 
     public class CustomException : Exception {
+        public CustomException() {}
         public CustomException(string msg): base(msg) {}
+        public CustomException(string msg, Exception inner) : base(msg, inner) {}
     }
 
     class Overrider : Dummy.TestObject {