diff --git a/include/fastcdr/Cdr.h b/include/fastcdr/Cdr.h
index 68f7df4b..6429a40f 100644
--- a/include/fastcdr/Cdr.h
+++ b/include/fastcdr/Cdr.h
@@ -703,8 +703,9 @@ class Cdr
      * @param string_t The string that will be serialized in the buffer.
      * @return Reference to the eprosima::fastcdr::Cdr object.
      * @exception exception::NotEnoughMemoryException This exception is thrown when trying to serialize a position that exceeds the internal memory size.
+     * @exception exception::BadParamException This exception is thrown when trying to serialize a string with null characters.
      */
-    TEMPLATE_SPEC
+    Cdr_DllAPI TEMPLATE_SPEC
     Cdr& serialize(
             const std::string& string_t);