diff --git a/script/device/Image.py b/script/device/Image.py
index b6e328d..2132343 100644
--- a/script/device/Image.py
+++ b/script/device/Image.py
@@ -131,7 +131,7 @@ class Image(DeviceBase, Readable):
         if filename is None:
             filename = self.pixel.get_image_filename()
         
-        size = 4 * self.pixel.PIX_XDIM, self.pixel.PIX_YDIM
+        size = 4 * self.pixel.PIX_XDIM * self.pixel.PIX_YDIM
         print "Waiting image file: " + filename  + " size= " + size
         wait_for_file_size(filename, size)