diff --git a/app/gui/oven_control/cookbook.cpp b/app/gui/oven_control/cookbook.cpp
index d655de8..0b38472 100644
--- a/app/gui/oven_control/cookbook.cpp
+++ b/app/gui/oven_control/cookbook.cpp
@@ -57,7 +57,7 @@ CookBook::CookBook(Define::CookType type)
     }
 
     int cookNameSection;
-    Define::language_type lang = (Define::language_type) Config::getConfigValue(Define::config_language).d32;
+    Define::language_type lang = (Define::language_type) Config::getInstance()->getConfigValue(Define::config_language).d32;
     switch (lang)
     {
     case Define::language_kr:
diff --git a/app/gui/oven_control/slider.h b/app/gui/oven_control/slider.h
index 14c6a88..051bd12 100644
--- a/app/gui/oven_control/slider.h
+++ b/app/gui/oven_control/slider.h
@@ -18,11 +18,11 @@ class Slider : public QWidget
     QPixmap sub;
     QPixmap handle;
 
-    int grooveMin;
-    int grooveMax;
+    int minSliderX;
+    int maxSliderX;
 
-    QPoint groovePoint;
-    QPoint subPoint;
+    QPoint grooveLeftTop;
+    QPoint subLeftTop;
 
     bool subVisible_;
     bool focused;