diff --git a/dive.h b/dive.h
index 277573f5b..f1570d31e 100644
--- a/dive.h
+++ b/dive.h
@@ -640,7 +640,6 @@ struct divedatapoint {
 
 struct diveplan {
 	timestamp_t when;
-	int lastdive_nr;
 	int surface_pressure; /* mbar */
 	int bottomsac;	/* ml/min */
 	int decosac;	  /* ml/min */