1 files changed, 1 insertions, 0 deletions
diff --git a/dive.h b/dive.h
index ccba7a09f..2b69c949c 100644
--- a/dive.h
+++ b/dive.h
@@ -145,6 +145,7 @@ typedef struct {
 	struct gasmix gasmix;
 	pressure_t start, end, sample_start, sample_end;
 	depth_t depth;
+	bool used;
 } cylinder_t;
 
 typedef struct {