diff --git a/reactos/boot/freeldr/freeldr/windows/winldr.c b/reactos/boot/freeldr/freeldr/windows/winldr.c
index 0121773e3a8..4ba7b1bcb29 100644
--- a/reactos/boot/freeldr/freeldr/windows/winldr.c
+++ b/reactos/boot/freeldr/freeldr/windows/winldr.c
@@ -37,6 +37,7 @@ extern char reactos_arc_strings[32][256];
 
 extern BOOLEAN UseRealHeap;
 extern ULONG LoaderPagesSpanned;
+extern BOOLEAN AcpiPresent;
 
 BOOLEAN
 WinLdrCheckForLoadedDll(IN OUT PLOADER_PARAMETER_BLOCK WinLdrBlock,
@@ -196,6 +197,13 @@ WinLdrInitializePhase1(PLOADER_PARAMETER_BLOCK LoaderBlock,
 	Extension->MinorVersion = VersionToBoot & 0xFF;
 	Extension->Profile.Status = 2;
 
+	/* Check if ACPI is present */
+	if (AcpiPresent)
+	{
+		/* See KiRosFrldrLpbToNtLpb for details */
+		Extension->AcpiTable = (PVOID)1;
+	}
+
 	/* Load drivers database */
 	strcpy(MiscFiles, BootPath);
 	strcat(MiscFiles, "AppPatch\\drvmain.sdb");