diff --git a/gui/spkui_general.cpp b/gui/spkui_general.cpp
index 78d0b7f..482f0a2 100644
--- a/gui/spkui_general.cpp
+++ b/gui/spkui_general.cpp
@@ -54,6 +54,7 @@ namespace SpkUi
     StylesheetBase = ObtainStylesheet.readAll();
     ObtainStylesheet.close();
 
+    CurrentStyle = SpkUiStyle::Invalid;
     SetGlobalStyle(Light, false);
 
     // Initalize crash handler
diff --git a/inc/spkui_general.h b/inc/spkui_general.h
index 3fcd0cb..3f7552a 100644
--- a/inc/spkui_general.h
+++ b/inc/spkui_general.h
@@ -16,7 +16,7 @@
 namespace SpkUi
 {
 
-  enum SpkUiStyle { Light, Dark };
+  enum SpkUiStyle { Invalid, Light, Dark };
   enum SpkButtonStyle { Normal = 0, Recommend, Warn };
 
   class SpkPopup;