diff --git a/src/UglyToad.PdfPig/Writer/PdfPageBuilder.cs b/src/UglyToad.PdfPig/Writer/PdfPageBuilder.cs
index 172003c5..4a82e597 100644
--- a/src/UglyToad.PdfPig/Writer/PdfPageBuilder.cs
+++ b/src/UglyToad.PdfPig/Writer/PdfPageBuilder.cs
@@ -520,11 +520,14 @@
         /// <summary>
         /// Adds the JPEG image represented by the input stream at the specified location.
         /// </summary>
-        public AddedImage AddJpeg(Stream fileStream, PdfRectangle placementRectangle)
+        public AddedImage AddJpeg(Stream fileStream, PdfRectangle placementRectangle = default)
         {
             var startFrom = fileStream.Position;
             var info = JpegHandler.GetInformation(fileStream);
 
+            if (placementRectangle.Equals(default(PdfRectangle)))
+                placementRectangle = new PdfRectangle(0, 0, info.Width, info.Height);
+
             byte[] data;
             using (var memory = new MemoryStream())
             {
@@ -612,10 +615,13 @@
         /// <summary>
         /// Adds the PNG image represented by the input stream at the specified location.
         /// </summary>
-        public AddedImage AddPng(Stream pngStream, PdfRectangle placementRectangle)
+        public AddedImage AddPng(Stream pngStream, PdfRectangle placementRectangle = default)
         {
             var png = Png.Open(pngStream);
 
+            if (placementRectangle.Equals(default(PdfRectangle)))
+                placementRectangle = new PdfRectangle(0, 0, png.Width, png.Height);
+
             byte[] data;
             var pixelBuffer = new byte[3];
             using (var memoryStream = new MemoryStream())