diff --git a/Library/OcMachoLib/Header.c b/Library/OcMachoLib/Header.c
index 4c91d416..b5a8d978 100644
--- a/Library/OcMachoLib/Header.c
+++ b/Library/OcMachoLib/Header.c
@@ -120,7 +120,7 @@ MachoGetLastAddress64 (
     Segment != NULL;
     Segment = MachoGetNextSegment64 (Context, Segment)
     ) {
-    Address = (Segment->VirtualAddress + Segment->Hdr.Size);
+    Address = (Segment->VirtualAddress + Segment->Size);
 
     if (Address > LastAddress) {
       LastAddress = Address;