diff --git a/headers.h b/headers.h
index 31e67120..e5499464 100644
--- a/headers.h
+++ b/headers.h
@@ -11,7 +11,7 @@
 #ifdef _WIN32_WINNT
 #undef _WIN32_WINNT
 #endif
-#define _WIN32_WINNT 0x0400
+#define _WIN32_WINNT 0x0500
 #ifdef _WIN32_IE
 #undef _WIN32_IE
 #endif
diff --git a/ui.cpp b/ui.cpp
index 800bbfdf..d17c208f 100644
--- a/ui.cpp
+++ b/ui.cpp
@@ -109,6 +109,8 @@ void SetItemTextColour(wxListCtrl* listCtrl, int nIndex, const wxColour& colour)
     // so don't want to set it unless it's different.  Default colour has
     // alpha 0 transparent, so our colours don't match using operator==.
     wxColour c1 = listCtrl->GetItemTextColour(nIndex);
+    if (!c1.IsOk())
+        c1 = wxColour(0,0,0);
     if (colour.Red() != c1.Red() || colour.Green() != c1.Green() || colour.Blue() != c1.Blue())
         listCtrl->SetItemTextColour(nIndex, colour);
 }