diff --git a/include/llvm/IR/DIBuilder.h b/include/llvm/IR/DIBuilder.h
index 5482de87d6c..ae1ac650a9e 100644
--- a/include/llvm/IR/DIBuilder.h
+++ b/include/llvm/IR/DIBuilder.h
@@ -172,8 +172,12 @@ namespace llvm {
 
     /// \brief Create debugging information entry for a pointer to member.
     /// @param PointeeTy Type pointed to by this pointer.
+    /// @param SizeInBits  Size.
+    /// @param AlignInBits Alignment. (optional)
     /// @param Class Type for which this pointer points to members of.
-    DIDerivedType createMemberPointerType(DIType PointeeTy, DIType Class);
+    DIDerivedType createMemberPointerType(DIType PointeeTy, DIType Class,
+                                          uint64_t SizeInBits,
+                                          uint64_t AlignInBits = 0);
 
     /// createReferenceType - Create debugging information entry for a c++
     /// style reference or rvalue reference type.
diff --git a/lib/IR/DIBuilder.cpp b/lib/IR/DIBuilder.cpp
index 1874d31e0a5..6485ca5a003 100644
--- a/lib/IR/DIBuilder.cpp
+++ b/lib/IR/DIBuilder.cpp
@@ -328,14 +328,15 @@ DIBuilder::createPointerType(DIType PointeeTy, uint64_t SizeInBits,
   return DIDerivedType(MDNode::get(VMContext, Elts));
 }
 
-DIDerivedType DIBuilder::createMemberPointerType(DIType PointeeTy,
-                                                 DIType Base) {
+DIDerivedType
+DIBuilder::createMemberPointerType(DIType PointeeTy, DIType Base,
+                                   uint64_t SizeInBits, uint64_t AlignInBits) {
   // Pointer types are encoded in DIDerivedType format.
   Metadata *Elts[] = {HeaderBuilder::get(dwarf::DW_TAG_ptr_to_member_type)
                           .concat(StringRef())
                           .concat(0) // Line
-                          .concat(0) // Size
-                          .concat(0) // Align
+                          .concat(SizeInBits) // Size
+                          .concat(AlignInBits) // Align
                           .concat(0) // Offset
                           .concat(0) // Flags
                           .get(VMContext),