diff --git a/PowerEditor/src/Notepad_plus.cpp b/PowerEditor/src/Notepad_plus.cpp
index 869d66b8..051a69d5 100644
--- a/PowerEditor/src/Notepad_plus.cpp
+++ b/PowerEditor/src/Notepad_plus.cpp
@@ -7688,12 +7688,18 @@ bool Notepad_plus::str2Cliboard(const char *str2cpy)
 	return true;
 }
 
+
 void Notepad_plus::markSelectedText()
 {
 	const NppGUI & nppGUI = (NppParameters::getInstance())->getNppGUI();
 	if (!nppGUI._enableSmartHilite)
 		return;
 
+	//short
+	if (_pEditView->isSelecting())
+		//printStr("catch u!!!");
+		return;
+
 	//
 	if (_pEditView->getCurrentDocLen() > smartHighlightFileSizeLimit)
 		return;
diff --git a/PowerEditor/src/ScitillaComponent/ScintillaEditView.h b/PowerEditor/src/ScitillaComponent/ScintillaEditView.h
index 40ac09d4..ca40a7da 100644
--- a/PowerEditor/src/ScitillaComponent/ScintillaEditView.h
+++ b/PowerEditor/src/ScitillaComponent/ScintillaEditView.h
@@ -481,6 +481,27 @@ public:
 	bool markerMarginClick(int lineNumber);	//true if it did something
 	void notifyMarkers(Buffer * buf, bool isHide, int location, bool del);
 	void runMarkers(bool doHide, int searchStart, bool endOfDoc, bool doDelete);
+
+	bool isSelecting() const {
+		static CharacterRange previousSelRange = getSelection();
+		CharacterRange currentSelRange = getSelection();
+		
+		if (currentSelRange.cpMin == currentSelRange.cpMax)
+		{
+			previousSelRange = currentSelRange;
+			return false;
+		}
+
+		if ((previousSelRange.cpMin == currentSelRange.cpMin) || (previousSelRange.cpMax == currentSelRange.cpMax))
+		{
+			previousSelRange = currentSelRange;
+			return true;
+		}
+		
+		previousSelRange = currentSelRange;
+		return false;
+	};
+
 protected:
 	static HINSTANCE _hLib;
 	static int _refCount;