diff --git a/cocos2dx/label_nodes/CCLabelBMFont.cpp b/cocos2dx/label_nodes/CCLabelBMFont.cpp
index 07d1de5661..737e801e42 100644
--- a/cocos2dx/label_nodes/CCLabelBMFont.cpp
+++ b/cocos2dx/label_nodes/CCLabelBMFont.cpp
@@ -1260,6 +1260,7 @@ void CCLabelBMFont::updateLabel()
             {
                 float lineWidth = 0.0f;
                 unsigned int line_length = last_line.size();
+				// if last line is empty we must just increase lineNumber and work with next line
                 if (line_length == 0)
                 {
                     lineNumber++;