diff --git a/libpfr/src/pfr.cpp b/libpfr/src/pfr.cpp
index d17a679..998c7b9 100644
--- a/libpfr/src/pfr.cpp
+++ b/libpfr/src/pfr.cpp
@@ -566,7 +566,7 @@
 int setBMCBusy(bool setValue)
 {
     uint32_t bmcBusyReg = 0x63;
-    uint8_t valHigh = 0x01;
+    uint8_t valHigh = 0x80;
     uint8_t mailBoxReply = 0;
 
     if (getMBRegister(bmcBusyReg, mailBoxReply))
@@ -576,7 +576,7 @@
     uint8_t readValue = mailBoxReply | valHigh;
     if (setValue == false)
     {
-        readValue &= 0b11111110;
+        readValue &= 0b01111111;
     }
     if (!setMBRegister(bmcBusyReg, readValue))
     {