diff --git a/cocos/2d/CCLabel.cpp b/cocos/2d/CCLabel.cpp
index 8a37a60c16..f1e674876e 100644
--- a/cocos/2d/CCLabel.cpp
+++ b/cocos/2d/CCLabel.cpp
@@ -712,8 +712,8 @@ bool Label::recordLetterInfo(const cocos2d::Vec2& point,const FontLetterDefiniti
 
     _lettersInfo[spriteIndex].def = letterDef;
     _lettersInfo[spriteIndex].position = point;
-    _lettersInfo[spriteIndex].contentSize.width = _lettersInfo[spriteIndex].def.width;
-    _lettersInfo[spriteIndex].contentSize.height = _lettersInfo[spriteIndex].def.height;
+    _lettersInfo[spriteIndex].contentSize.width = letterDef.width;
+    _lettersInfo[spriteIndex].contentSize.height = letterDef.height;
     _limitShowCount++;
 
     return _lettersInfo[spriteIndex].def.validDefinition;
diff --git a/cocos/2d/CCLabelTextFormatter.cpp b/cocos/2d/CCLabelTextFormatter.cpp
index 5b2027b62e..638897965e 100644
--- a/cocos/2d/CCLabelTextFormatter.cpp
+++ b/cocos/2d/CCLabelTextFormatter.cpp
@@ -111,7 +111,7 @@ bool LabelTextFormatter::multilineText(Label *theLabel)
                 multiline_string.insert(multiline_string.end(), last_word.begin(), last_word.end());
                 last_word.clear();
 
-                startOfLine = 0.f;
+                startOfLine += lineWidth;
             }
             else
             {
diff --git a/tests/cpp-tests/Classes/LabelTest/LabelTestNew.cpp b/tests/cpp-tests/Classes/LabelTest/LabelTestNew.cpp
index f1b7fd52c5..e367f96e05 100644
--- a/tests/cpp-tests/Classes/LabelTest/LabelTestNew.cpp
+++ b/tests/cpp-tests/Classes/LabelTest/LabelTestNew.cpp
@@ -79,6 +79,7 @@ NewLabelTests::NewLabelTests()
     ADD_TEST_CASE(LabelIssue11576Test);
     ADD_TEST_CASE(LabelIssue11699Test);
     ADD_TEST_CASE(LabelIssue12259Test);
+    ADD_TEST_CASE(LabelIssue12409Test);
 };
 
 LabelTTFAlignmentNew::LabelTTFAlignmentNew()
@@ -1972,3 +1973,41 @@ std::string LabelIssue12259Test::subtitle() const
 {
     return "the texture of character should be cropped.";
 }
+
+LabelIssue12409Test::LabelIssue12409Test()
+{
+    auto center = VisibleRect::center();
+
+    auto label = Label::createWithTTF("abcdefghijklmn", "fonts/arial.ttf", 30);
+    label->setWidth(70);
+    label->setLineBreakWithoutSpace(true);
+    label->setPosition(center.x, center.y);
+    addChild(label);
+
+    auto labelSize = label->getContentSize();
+    auto winSize = Director::getInstance()->getWinSize();
+    Vec2 labelOrigin;
+    labelOrigin.x = winSize.width / 2 - (labelSize.width / 2);
+    labelOrigin.y = winSize.height / 2 - (labelSize.height / 2);
+    Vec2 vertices[4] =
+    {
+        Vec2(labelOrigin.x, labelOrigin.y),
+        Vec2(labelOrigin.x + labelSize.width, labelOrigin.y),
+        Vec2(labelOrigin.x + labelSize.width, labelOrigin.y + labelSize.height),
+        Vec2(labelOrigin.x, labelOrigin.y + labelSize.height)
+    };
+
+    auto drawNode = DrawNode::create();
+    drawNode->drawPoly(vertices, 4, true, Color4F::WHITE);
+    addChild(drawNode);
+}
+
+std::string LabelIssue12409Test::title() const
+{
+    return "Test for Issue #12409";
+}
+
+std::string LabelIssue12409Test::subtitle() const
+{
+    return "Testing auto-wrapping without space.";
+}
diff --git a/tests/cpp-tests/Classes/LabelTest/LabelTestNew.h b/tests/cpp-tests/Classes/LabelTest/LabelTestNew.h
index 6daece44e8..826efbea20 100644
--- a/tests/cpp-tests/Classes/LabelTest/LabelTestNew.h
+++ b/tests/cpp-tests/Classes/LabelTest/LabelTestNew.h
@@ -598,4 +598,15 @@ public:
     virtual std::string subtitle() const override;
 };
 
+class LabelIssue12409Test : public AtlasDemoNew
+{
+public:
+    CREATE_FUNC(LabelIssue12409Test);
+
+    LabelIssue12409Test();
+
+    virtual std::string title() const override;
+    virtual std::string subtitle() const override;
+};
+
 #endif