diff --git a/scripts/main.ps1 b/scripts/main.ps1
index af041731..680f7f5c 100644
--- a/scripts/main.ps1
+++ b/scripts/main.ps1
@@ -303,7 +303,7 @@ $sync["Form"].Add_MouseLeftButtonDown({
 })
 
 $sync["Form"].Add_MouseDoubleClick({
-    if ($_.OriginalSource.Name -eq "NavDockPanel" -OR
+    if ($_.OriginalSource.Name -eq "NavDockPanel" -or
         $_.OriginalSource.Name -eq "GridBesideNavDockPanel") {
             if ($sync["Form"].WindowState -eq [Windows.WindowState]::Normal) {
                 $sync["Form"].WindowState = [Windows.WindowState]::Maximized