1 files changed, 1 insertions, 0 deletions
diff --git a/src/image.h b/src/image.h
index 85265028..db1b491e 100644
--- a/src/image.h
+++ b/src/image.h
@@ -99,6 +99,7 @@ struct image {
 
 	/* Incident intensity (if unknown, put 1.0) */
 	double			f0;
+	int			f0_available;
 
 	int			width;
 	int			height;