diff --git a/src/driver/fb_window.cpp b/src/driver/fb_window.cpp
index a39aa05e9..8d6ddfa23 100644
--- a/src/driver/fb_window.cpp
+++ b/src/driver/fb_window.cpp
@@ -62,7 +62,7 @@ bool CFBWindow::paintIcon(const char * const _filename, const int _x, const int
 	return 0;
 }
 
-void CFBWindow::RenderString(const font_t _font, const int _x, const int _y, const int _width, const char * const _text, const color_t _color, const int _boxheight, const bool _utf8_encoded)
+void CFBWindow::RenderString(const font_t _font, const int _x, const int _y, const int _width, const char * const _text, const color_t _color, const int _boxheight, const unsigned int _flags)
 {
-	((Font *)_font)->RenderString(x + _x, y + _y, _width, _text, _color, _boxheight, _utf8_encoded);
+	((Font *)_font)->RenderString(x + _x, y + _y, _width, _text, _color, _boxheight, _flags);
 }
diff --git a/src/driver/fb_window.h b/src/driver/fb_window.h
index 9e4a0b347..0f9cf8a49 100644
--- a/src/driver/fb_window.h
+++ b/src/driver/fb_window.h
@@ -44,7 +44,7 @@ class CFBWindow
 
 	void paintBoxRel(const int _x, const int _y, const int _dx, const int _dy, const color_t _col, int radius = 0, int type = 0xF);
 	bool paintIcon(const char * const _filename, const int _x, const int _y, const int _h = 0, const color_t _offset = 1);
-	void RenderString(const font_t _font, const int _x, const int _y, const int _width, const char * const _text, const color_t _color, const int _boxheight = 0, const bool _utf8_encoded = false);
+	void RenderString(const font_t _font, const int _x, const int _y, const int _width, const char * const _text, const color_t _color, const int _boxheight = 0, const unsigned int _flags = Font::IS_UTF8);
 };
 
 #endif /* __fb_window_h__ */
diff --git a/src/driver/fontrenderer.h b/src/driver/fontrenderer.h
index 6c4ced71e..7a67b68f9 100644
--- a/src/driver/fontrenderer.h
+++ b/src/driver/fontrenderer.h
@@ -71,11 +71,11 @@ class Font
 			FULLBG = 2
 		};
 
-	void RenderString(int x, int y, const int width, const char *        text, const fb_pixel_t color, const int boxheight = 0, const unsigned int flags = 0);
-	void RenderString(int x, int y, const int width, const std::string & text, const fb_pixel_t color, const int boxheight = 0, const unsigned int flags = 0);
+	void RenderString(int x, int y, const int width, const char *        text, const fb_pixel_t color, const int boxheight = 0, const unsigned int flags = IS_UTF8);
+	void RenderString(int x, int y, const int width, const std::string & text, const fb_pixel_t color, const int boxheight = 0, const unsigned int flags = IS_UTF8);
 
-	int getRenderWidth(const char *        text, const bool utf8_encoded = false);
-	int getRenderWidth(const std::string & text, const bool utf8_encoded = false);
+	int getRenderWidth(const char *        text, const bool utf8_encoded = true);
+	int getRenderWidth(const std::string & text, const bool utf8_encoded = true);
 	int getHeight(void);
 	int getDigitHeight(void);
 	int getMaxDigitWidth(void);