diff --git a/Include/Library/OcMachoLib.h b/Include/Library/OcMachoLib.h
index 16e59817..31b59d4a 100644
--- a/Include/Library/OcMachoLib.h
+++ b/Include/Library/OcMachoLib.h
@@ -56,6 +56,17 @@ MachoGetMachHeader64 (
   IN OUT OC_MACHO_CONTEXT  *Context
   );
 
+/**
+  Returns the Mach-O's file size.
+
+  @param[in,out] Context  Context of the Mach-O.
+
+**/
+UINTN
+MachoGetFileSize (
+  IN OUT OC_MACHO_CONTEXT  *Context
+  );
+
 /**
   Returns the last virtual address of a Mach-O.
 
diff --git a/Library/OcMachoLib/Header.c b/Library/OcMachoLib/Header.c
index a83a0d05..0418f51b 100644
--- a/Library/OcMachoLib/Header.c
+++ b/Library/OcMachoLib/Header.c
@@ -51,6 +51,23 @@ MachoGetMachHeader64 (
   return (MACH_HEADER_64 *)Context->MachHeader;
 }
 
+/**
+  Returns the Mach-O's file size.
+
+  @param[in,out] Context  Context of the Mach-O.
+
+**/
+UINTN
+MachoGetFileSize (
+  IN OUT OC_MACHO_CONTEXT  *Context
+  )
+{
+  ASSERT (Context != NULL);
+  ASSERT (Context->FileSize != 0);
+
+  return Context->FileSize;
+}
+
 /**
   Initializes a Mach-O Context.