diff --git a/Library/OcRtcLib/AppleRtcRam.c b/Library/OcRtcLib/AppleRtcRam.c
index 083403b2..c5916cf2 100644
--- a/Library/OcRtcLib/AppleRtcRam.c
+++ b/Library/OcRtcLib/AppleRtcRam.c
@@ -332,7 +332,7 @@ OcAppleRtcRamInstallProtocol (
     );
 
   if (!EFI_ERROR (Status)) {
-    for (Index = 0; Index < APPLE_RTC_TOTAL_SIZE; ++Index) {
+    for (Index = 0; Index < RtcBlacklistSize; ++Index) {
       mEmulatedRtcStatus[RtcBlacklist[Index]] = TRUE;
       DEBUG ((DEBUG_INFO, "OCRTC: Blacklisted %02x address\n", RtcBlacklist[Index]));
     }