diff --git a/BaseLib/FileTools.h b/BaseLib/FileTools.h
index 2858e11f79b48d177d77ebe1dcd8642e5d7b1f79..efe52b9826a8960ba66ced0750b01bd7fa472a47 100644
--- a/BaseLib/FileTools.h
+++ b/BaseLib/FileTools.h
@@ -31,8 +31,8 @@ bool IsFileExisting(const std::string &strFilename);
 /**
  * \brief write value as binary into the given output stream
  *
- * \tparam T    data type of the value
- * \param out   output stream
+ * \param T    data type of the value
+ * \param out   output stream, have to be opened in binary mode
  * \param val   value
  */
 template <typename T> void writeValueBinary(std::ostream &out, T const& val)