diff --git a/bugn.exe b/bugn.exe
index 0c22e46..579b10d 100644
Binary files a/bugn.exe and b/bugn.exe differ
diff --git a/src/View.ahk b/src/View.ahk
index bd0bbcf..a6efc6c 100644
--- a/src/View.ahk
+++ b/src/View.ahk
@@ -184,7 +184,7 @@ View_getTiledWndIds(m, v)
   StringTrimRight, wndIds, View_#%m%_#%v%_wndIds, 1
   Loop, PARSE, wndIds, `;
   {
-    If Not Window_#%A_LoopField%_isFloating And WinExist("ahk_id " A_LoopField) and Not Window_isHung(A_LoopField)
+    If A_LoopField And Not Window_#%A_LoopField%_isFloating And WinExist("ahk_id " A_LoopField) and Not Window_isHung(A_LoopField)
     {
       n += 1
       tiledWndIds .= A_LoopField ";"