diff --git a/qse/include/qse/cmn/StrBase.hpp b/qse/include/qse/cmn/StrBase.hpp
index 6caf0338..122cc079 100644
--- a/qse/include/qse/cmn/StrBase.hpp
+++ b/qse/include/qse/cmn/StrBase.hpp
@@ -359,6 +359,11 @@ protected:
 
 public:
 
+	bool isEmpty() const
+	{
+		return this->_item->size <= 0;
+	}
+
 	qse_size_t getSize () const 
 	{
 		return this->_item->size;