diff --git a/delphi-backend/Source/PM.Bridge.pas b/delphi-backend/Source/PM.Bridge.pas
index 7b3f13e..c214a98 100644
--- a/delphi-backend/Source/PM.Bridge.pas
+++ b/delphi-backend/Source/PM.Bridge.pas
@@ -1120,6 +1120,9 @@ end;
 // Can't-tell (OpenProcess denied, which protected/elevated processes do)
 // counts as elevated: better an honest "blocked" than a silent no-op.
 function IsWindowProcessElevated(AHwnd: HWND): Boolean;
+const
+  // Missing from Winapi.Windows — Win32 constant (WinNT.h, Vista+).
+  PROCESS_QUERY_LIMITED_INFORMATION = $1000;
 var
   LPid: DWORD;
   LProc, LToken: THandle;