diff --git a/JString.h b/JString.h
index cf36dc5..5974162 100644
--- a/JString.h
+++ b/JString.h
@@ -75,6 +75,10 @@ namespace coreutils {
 	 return Proxy(*this, key);
       }
 
+//      JString & operator=(coreutils:: ZString value) {
+	 
+//      }
+      
    };
 
 }
diff --git a/testing/jstring_test.cpp b/testing/jstring_test.cpp
index ac4fc64..5640f7a 100644
--- a/testing/jstring_test.cpp
+++ b/testing/jstring_test.cpp
@@ -31,8 +31,10 @@ int main(int argc, char **argv) {
 //   std::cout << "--------" << std::endl;
 //   std::cout << "key2: " << test2["key2"] << std::endl;
 
+   coreutils::MString test0("{\"Number:\"0\",\"id\":\"XXXXX\"}");
    coreutils::JString test1;
    coreutils::MString test2;
+   test1 = test0;
    test1["name"] = "Cohen";
    test1["health"] = "100";
    test1["comment"] = "this is a comment";
diff --git a/testing/mstring_test b/testing/mstring_test
index a38adc3..4fe5130 100755
Binary files a/testing/mstring_test and b/testing/mstring_test differ
diff --git a/testing/zstring_test b/testing/zstring_test
index 4fc5ae8..57e8bb9 100755
Binary files a/testing/zstring_test and b/testing/zstring_test differ