diff --git a/core/fpdfapi/edit/cpdf_contentstream_write_utils.cpp b/core/fpdfapi/edit/cpdf_contentstream_write_utils.cpp
index 7cd53e7..33642d4 100644
--- a/core/fpdfapi/edit/cpdf_contentstream_write_utils.cpp
+++ b/core/fpdfapi/edit/cpdf_contentstream_write_utils.cpp
@@ -30,3 +30,11 @@
   WriteFloat(stream, point.y);
   return stream;
 }
+
+std::ostream& WriteRect(std::ostream& stream, const CFX_FloatRect& rect) {
+  WriteFloat(stream, rect.left) << " ";
+  WriteFloat(stream, rect.bottom) << " ";
+  WriteFloat(stream, rect.Width()) << " ";
+  WriteFloat(stream, rect.Height());
+  return stream;
+}
diff --git a/core/fpdfapi/edit/cpdf_contentstream_write_utils.h b/core/fpdfapi/edit/cpdf_contentstream_write_utils.h
index 22c40d7..abc700f 100644
--- a/core/fpdfapi/edit/cpdf_contentstream_write_utils.h
+++ b/core/fpdfapi/edit/cpdf_contentstream_write_utils.h
@@ -12,5 +12,6 @@
 std::ostream& WriteFloat(std::ostream& stream, float value);
 std::ostream& WriteMatrix(std::ostream& stream, const CFX_Matrix& matrix);
 std::ostream& WritePoint(std::ostream& stream, const CFX_PointF& point);
+std::ostream& WriteRect(std::ostream& stream, const CFX_FloatRect& rect);
 
 #endif  // CORE_FPDFAPI_EDIT_CPDF_CONTENTSTREAM_WRITE_UTILS_H_