diff --git a/planner.c b/planner.c
index d3b5f288c..cf274bb31 100644
--- a/planner.c
+++ b/planner.c
@@ -676,7 +676,8 @@ void plan(struct diveplan *diveplan, char **cached_datap, struct dive **divep, b
 		/* We will break out when we hit the surface */
 		do {
 			/* Ascend to next stop depth */
-			assert(deco_allowed_depth(tissue_tolerance, diveplan->surface_pressure / 1000.0, dive, 1) < depth);
+			if (deco_allowed_depth(tissue_tolerance, diveplan->surface_pressure / 1000.0, dive, 1) < depth)
+				fprintf(stderr, "user provided way point above ceiling\n");
 			int deltad = ascend_velocity(depth, avg_depth, bottom_time) * TIMESTEP;
 			if (ascend_velocity(depth, avg_depth, bottom_time) != last_ascend_rate) {
 				plan_add_segment(diveplan, clock - previous_point_time, depth, o2, he, po2, false);