diff --git a/SecurityPkg/Library/DxeImageVerificationLib/DxeImageVerificationLib.c b/SecurityPkg/Library/DxeImageVerificationLib/DxeImageVerificationLib.c
index 3331b6862e..ca1bdc0be8 100644
--- a/SecurityPkg/Library/DxeImageVerificationLib/DxeImageVerificationLib.c
+++ b/SecurityPkg/Library/DxeImageVerificationLib/DxeImageVerificationLib.c
@@ -1448,7 +1448,7 @@ IsAllowedByDb (
             if (Status == EFI_BUFFER_TOO_SMALL) {
               goto Done;
             }
-            DbxData = (UINT8 *) AllocateZeroPool (DataSize);
+            DbxData = (UINT8 *) AllocateZeroPool (DbxDataSize);
             if (DbxData == NULL) {
               goto Done;
             }