1 files changed, 1 insertions, 0 deletions
diff --git a/dive.h b/dive.h
index 28753e2b9..c881d2450 100644
--- a/dive.h
+++ b/dive.h
@@ -662,6 +662,7 @@ extern void fill_default_cylinder(cylinder_t *cyl);
 extern void add_gas_switch_event(struct dive *dive, struct divecomputer *dc, int time, int idx);
 extern void add_event(struct divecomputer *dc, int time, int type, int flags, int value, const char *name);
 extern void per_cylinder_mean_depth(struct dive *dive, struct divecomputer *dc, int *mean, int *duration);
+extern int get_cylinder_index(struct dive *dive, struct event *ev);
 
 /* UI related protopypes */