Signed-off-by: David Woodhouse <dwmw2@infradead.org>
---
 OvmfPkg/Csm/LegacyBiosDxe/LegacyBios.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/OvmfPkg/Csm/LegacyBiosDxe/LegacyBios.c b/OvmfPkg/Csm/LegacyBiosDxe/LegacyBios.c
index 05e3ffd2bb..69abd06c40 100644
--- a/OvmfPkg/Csm/LegacyBiosDxe/LegacyBios.c
+++ b/OvmfPkg/Csm/LegacyBiosDxe/LegacyBios.c
@@ -568,7 +568,7 @@ ShadowAndStartLegacy16 (
   //
   // Skip Floppy and possible onboard IDE drives
   //
-  EfiToLegacy16BootTable->NumberBbsEntries = 1 + 2 * MAX_IDE_CONTROLLER;
+  EfiToLegacy16BootTable->NumberBbsEntries = sizeof(Private->IntThunk->BbsTable) / sizeof(BBS_TABLE);
 
   for (Index = 0; Index < (sizeof (Private->IntThunk->BbsTable) / sizeof (BBS_TABLE)); Index++) {
     BbsTable[Index].BootPriority = BBS_IGNORE_ENTRY;