diff --git a/reactos/boot/freeldr/freeldr/arch/i386/hardware.c b/reactos/boot/freeldr/freeldr/arch/i386/hardware.c
index afb2a376baf..ec0b3b76f6d 100644
--- a/reactos/boot/freeldr/freeldr/arch/i386/hardware.c
+++ b/reactos/boot/freeldr/freeldr/arch/i386/hardware.c
@@ -351,6 +351,9 @@ DetectPnpBios(HKEY SystemKey, U32 *BusNumber)
 
 
   x = PnpBiosGetDeviceNodeCount(&NodeSize, &NodeCount);
+  NodeCount &= 0xFF; // needed since some fscked up BIOSes return
+                     // wrong info (e.g. Mac Virtual PC)
+                     // e.g. look: http://my.execpc.com/~geezer/osd/pnp/pnp16.c
   if (x != 0 || NodeSize == 0 || NodeCount == 0)
     {
       DbgPrint((DPRINT_HWDETECT, "PnP-BIOS failed to enumerate device nodes\n"));