diff --git a/src/google/protobuf/stubs/stringpiece.h b/src/google/protobuf/stubs/stringpiece.h
index 91671659..8910688b 100644
--- a/src/google/protobuf/stubs/stringpiece.h
+++ b/src/google/protobuf/stubs/stringpiece.h
@@ -222,14 +222,6 @@ class LIBPROTOBUF_EXPORT StringPiece {
       : ptr_(str.data()), length_(0) {
     length_ = CheckedSsizeTFromSizeT(str.size());
   }
-#if defined(HAS_GLOBAL_STRING)
-  template <class Allocator>
-  StringPiece(  // NOLINT(runtime/explicit)
-      const basic_string<char, std::char_traits<char>, Allocator>& str)
-      : ptr_(str.data()), length_(0) {
-    length_ = CheckedSsizeTFromSizeT(str.size());
-  }
-#endif
 
   StringPiece(const char* offset, stringpiece_ssize_type len)
       : ptr_(offset), length_(len) {
diff --git a/src/google/protobuf/util/internal/proto_writer.cc b/src/google/protobuf/util/internal/proto_writer.cc
index 3e09c9bb..7a1a6cbd 100644
--- a/src/google/protobuf/util/internal/proto_writer.cc
+++ b/src/google/protobuf/util/internal/proto_writer.cc
@@ -64,6 +64,7 @@ ProtoWriter::ProtoWriter(TypeResolver* type_resolver,
       typeinfo_(TypeInfo::NewTypeInfo(type_resolver)),
       own_typeinfo_(true),
       done_(false),
+      ignore_unknown_fields_(false),
       element_(NULL),
       size_insert_(),
       output_(output),
@@ -71,7 +72,6 @@ ProtoWriter::ProtoWriter(TypeResolver* type_resolver,
       adapter_(&buffer_),
       stream_(new CodedOutputStream(&adapter_)),
       listener_(listener),
-      ignore_unknown_fields_(false),
       invalid_depth_(0),
       tracker_(new ObjectLocationTracker()) {}
 
@@ -82,6 +82,7 @@ ProtoWriter::ProtoWriter(const TypeInfo* typeinfo,
       typeinfo_(typeinfo),
       own_typeinfo_(false),
       done_(false),
+      ignore_unknown_fields_(false),
       element_(NULL),
       size_insert_(),
       output_(output),
@@ -89,7 +90,6 @@ ProtoWriter::ProtoWriter(const TypeInfo* typeinfo,
       adapter_(&buffer_),
       stream_(new CodedOutputStream(&adapter_)),
       listener_(listener),
-      ignore_unknown_fields_(false),
       invalid_depth_(0),
       tracker_(new ObjectLocationTracker()) {}