--- a/src/hugin_base/panodata/image_variables.h
+++ b/src/hugin_base/panodata/image_variables.h
@@ -132,6 +132,7 @@
 image_variable( ExifISO, double, 0 )
 image_variable( ExifDistance, double, 0 )
 image_variable( ExifFocalLength35, double, 0)
+image_variable( ExifCropFactor, double, 0)
 image_variable( ExifExposureTime, double, 0)
 image_variable( ExifDate, std::string, "")
 image_variable( ExifExposureMode, int, 0)