diff --git a/include/llvm/MC/MCExpr.h b/include/llvm/MC/MCExpr.h
index da3cebe..49bdfd9 100644
--- a/include/llvm/MC/MCExpr.h
+++ b/include/llvm/MC/MCExpr.h
@@ -90,7 +90,7 @@
   /// @param Res - The relocatable value, if evaluation succeeds.
   /// @param Layout - The assembler layout object to use for evaluating values.
   /// @result - True on success.
-  bool EvaluateAsRelocatable(MCValue &Res, const MCAsmLayout *Layout = 0) const;
+  bool EvaluateAsRelocatable(MCValue &Res, const MCAsmLayout &Layout) const;
 
   /// @}
 
diff --git a/lib/MC/MCAssembler.cpp b/lib/MC/MCAssembler.cpp
index 4ecedcb..bff8836 100644
--- a/lib/MC/MCAssembler.cpp
+++ b/lib/MC/MCAssembler.cpp
@@ -215,7 +215,7 @@
                                 MCValue &Target, uint64_t &Value) const {
   ++stats::EvaluateFixup;
 
-  if (!Fixup.getValue()->EvaluateAsRelocatable(Target, &Layout))
+  if (!Fixup.getValue()->EvaluateAsRelocatable(Target, Layout))
     report_fatal_error("expected relocatable expression");
 
   // FIXME: How do non-scattered symbols work in ELF? I presume the linker
diff --git a/lib/MC/MCExpr.cpp b/lib/MC/MCExpr.cpp
index e487416..58f2e94 100644
--- a/lib/MC/MCExpr.cpp
+++ b/lib/MC/MCExpr.cpp
@@ -409,12 +409,9 @@
 }
 
 bool MCExpr::EvaluateAsRelocatable(MCValue &Res,
-                                   const MCAsmLayout *Layout) const {
-  if (Layout)
-    return EvaluateAsRelocatableImpl(Res, &Layout->getAssembler(), Layout,
-                                     0, false);
-  else
-    return EvaluateAsRelocatableImpl(Res, 0, 0, 0, false);
+                                   const MCAsmLayout &Layout) const {
+  return EvaluateAsRelocatableImpl(Res, &Layout.getAssembler(), &Layout,
+                                   0, false);
 }
 
 bool MCExpr::EvaluateAsRelocatableImpl(MCValue &Res,