diff --git a/trunk/ProcessHacker/Program/Program.cs b/trunk/ProcessHacker/Program/Program.cs
index 962b8b190..fb4a2ef37 100644
--- a/trunk/ProcessHacker/Program/Program.cs
+++ b/trunk/ProcessHacker/Program/Program.cs
@@ -1271,6 +1271,11 @@ namespace ProcessHacker
                         HackerWindowTopMost = f.TopMost;
                 }));
 
+            foreach (Form form in Application.OpenForms)
+            {
+                form.TopMost = f.TopMost;
+            }
+
             UpdateWindowMenu(((MenuItem)sender).Parent, f);
         }