diff --git a/.gitignore b/.gitignore
index 724f64ab..9d22f88a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,9 +11,6 @@
 *.txt.h
 *.h.gch
 src/Main/veracrypt
-*.oo
-*.o.32
-*.o.64
 
 # wxWidgets Linux build artifacts
 src/wxrelease
diff --git a/src/Main/Forms/MainFrame.h b/src/Main/Forms/MainFrame.h
index 44329459..9089ce72 100644
--- a/src/Main/Forms/MainFrame.h
+++ b/src/Main/Forms/MainFrame.h
@@ -170,7 +170,7 @@ namespace VeraCrypt
 
         void EnsureVisible(bool bOnlyHeadingBar = false)
         {
-		wxDisplay display;
+        	wxDisplay display (this);
         	wxRect displayRect = display.GetClientArea();
         	    
         	bool bMove = false;