diff --git a/llvm/lib/CodeGen/MachOWriter.cpp b/llvm/lib/CodeGen/MachOWriter.cpp
index be21f5c..7c0855a 100644
--- a/llvm/lib/CodeGen/MachOWriter.cpp
+++ b/llvm/lib/CodeGen/MachOWriter.cpp
@@ -100,7 +100,7 @@
     }
 
     /// JIT SPECIFIC FUNCTIONS - DO NOT IMPLEMENT THESE HERE!
-    void startFunctionStub(unsigned StubSize) {
+    void startFunctionStub(unsigned StubSize, unsigned Alignment = 1) {
       assert(0 && "JIT specific function called!");
       abort();
     }