diff --git a/ClosedXML/Excel/XLWorkbook_Save.cs b/ClosedXML/Excel/XLWorkbook_Save.cs
index 7293f7d..fcba6c8 100644
--- a/ClosedXML/Excel/XLWorkbook_Save.cs
+++ b/ClosedXML/Excel/XLWorkbook_Save.cs
@@ -2556,6 +2556,7 @@
 
             using (var stream = new MemoryStream())
             {
+                pic.ImageStream.Position = 0;
                 pic.ImageStream.CopyTo(stream);
                 stream.Seek(0, SeekOrigin.Begin);
                 imagePart.FeedData(stream);