diff --git a/MString.cpp b/MString.cpp
index bc56a65..f915461 100644
--- a/MString.cpp
+++ b/MString.cpp
@@ -37,6 +37,12 @@ namespace coreutils {
       memcpy(this->data, data, length);
       cursor = this->data;
    }
+
+   MString::MString(ZString zstring) {
+      setSize(zstring.getLength());
+      memcpy(data, zstring.getData(), zstring.getLength());
+      cursor = data;      
+   }   
    
    MString::MString(const MString &mstring) {
       setSize(mstring.length);
diff --git a/MString.h b/MString.h
index 41bf47d..b24ae93 100644
--- a/MString.h
+++ b/MString.h
@@ -40,6 +40,8 @@ namespace coreutils
       MString(const char *data, size_t length);
       
       MString(const unsigned char *data, size_t length);
+
+      MString (ZString zstring);
       
       ///
       /// Consructor providing a copy of a ZString.
diff --git a/testing/jstring_test b/testing/jstring_test
index 4854818..0d335f1 100755
Binary files a/testing/jstring_test and b/testing/jstring_test differ
diff --git a/testing/mstring_test b/testing/mstring_test
index a38adc3..5379889 100755
Binary files a/testing/mstring_test and b/testing/mstring_test differ
diff --git a/testing/mstring_test.cpp b/testing/mstring_test.cpp
index fdf41e6..6a9987c 100644
--- a/testing/mstring_test.cpp
+++ b/testing/mstring_test.cpp
@@ -27,6 +27,8 @@ int main(int argc, char **argv) {
 
    coreutils::ZString test7("zstring data");
    coreutils::MString test4;
+   coreutils::MString test5 = test7;
+   std::cout << "coreutils::MString test5 = test7: [" << test5 << "]" << std::endl;
    test4 << "this is a test." << test7;
    std::cout << "char* operator<<: [" << test4 << "]." << std::endl;   
 
diff --git a/testing/zstring_test b/testing/zstring_test
index 4fc5ae8..d17a325 100755
Binary files a/testing/zstring_test and b/testing/zstring_test differ