diff --git a/planner.c b/planner.c
index 0724c8535..c43453a55 100644
--- a/planner.c
+++ b/planner.c
@@ -12,7 +12,11 @@
 #include "divelist.h"
 #include "display-gtk.h"
 
-int stoplevels[] = { 0, 3000, 6000, 9000, 12000, 15000, 21000, 30000, 42000, 60000, 90000 };
+
+int stoplevels[] = { 0, 3000, 6000, 9000, 12000, 15000, 18000, 21000, 24000, 27000,
+		     30000, 33000, 36000, 39000, 42000, 45000, 48000, 51000, 54000, 57000,
+		     60000, 63000, 66000, 69000, 72000, 75000, 78000, 81000, 84000, 87000,
+		     90000};
 
 #if DEBUG_PLAN
 void dump_plan(struct diveplan *diveplan)