diff --git a/src/gui/widget/textbox.cpp b/src/gui/widget/textbox.cpp
index 9808cb522..c1b41655e 100644
--- a/src/gui/widget/textbox.cpp
+++ b/src/gui/widget/textbox.cpp
@@ -875,7 +875,7 @@ bool CTextBox::clearScreenBuffer()
 	return false;
 }
 
-bool CTextBox::enableSaveScreen(bool mode)
+bool CTextBox::enableSaveScreen(const bool& mode)
 {
 	if (m_SaveScreen == mode)
 		return false;
@@ -939,7 +939,7 @@ int CTextBox::getMaxLineWidth(const std::string& text, Font* font)
 	return len;
 }
 
-void CTextBox::enableBackgroundPaint(bool mode)
+void CTextBox::enableBackgroundPaint(const bool& mode)
 {
 	m_nPaintBackground = mode;
 }
diff --git a/src/gui/widget/textbox.h b/src/gui/widget/textbox.h
index 63f06f9da..2b70ce933 100644
--- a/src/gui/widget/textbox.h
+++ b/src/gui/widget/textbox.h
@@ -181,10 +181,10 @@ class CTextBox : public sigc::trackable
 		void    refresh(void);
 		void    scrollPageDown(const int pages);
 		void    scrollPageUp(const int pages);
-		void    enableBackgroundPaint(bool mode = true);
+		void    enableBackgroundPaint(const bool& mode = true);
 		void    disableBackgroundPaint();
 		//enable screen saving behind chars, is required for transparent text paint, returns true if mode was changed
-		bool    enableSaveScreen(bool mode = true);
+		bool    enableSaveScreen(const bool& mode = true);
 		bool	setText(const std::string* newText, int max_width = 0, bool force_repaint = true);
 		void 	setTextColor(fb_pixel_t color_text){ m_textColor = color_text;};
 		void	setBackGroundRadius(const int radius, const int type = CORNER_ALL){m_nBgRadius = radius; m_nBgRadiusType = type;};