diff --git a/headers/private/interface/PictureDataWriter.h b/headers/private/interface/PictureDataWriter.h
index 92a16572ef..2bad8beb4e 100644
--- a/headers/private/interface/PictureDataWriter.h
+++ b/headers/private/interface/PictureDataWriter.h
@@ -18,8 +18,11 @@
 class BPositionIO;
 class PictureDataWriter {
 public:
+	PictureDataWriter();
 	PictureDataWriter(BPositionIO *data);
 	
+	status_t SetTo(BPositionIO *data);
+
 	status_t WriteSetOrigin(const BPoint &point);
 	status_t WriteInvertRect(const BRect &rect);
 	
diff --git a/src/kits/interface/PictureDataWriter.cpp b/src/kits/interface/PictureDataWriter.cpp
index 6d6faec64b..0627bf5121 100644
--- a/src/kits/interface/PictureDataWriter.cpp
+++ b/src/kits/interface/PictureDataWriter.cpp
@@ -15,6 +15,13 @@
 
 #include <stdio.h>
 
+PictureDataWriter::PictureDataWriter()
+	:
+	fData(NULL)
+{
+}
+
+
 PictureDataWriter::PictureDataWriter(BPositionIO *data)
 	:
 	fData(data)
@@ -22,6 +29,14 @@ PictureDataWriter::PictureDataWriter(BPositionIO *data)
 }
 
 
+status_t
+PictureDataWriter::SetTo(BPositionIO *data)
+{
+	fData = data;
+	return B_OK;
+}
+
+
 status_t
 PictureDataWriter::WriteSetOrigin(const BPoint &point)
 {