diff --git a/src/pray.c b/src/pray.c
index 29a2bd601..646de494c 100644
--- a/src/pray.c
+++ b/src/pray.c
@@ -421,7 +421,7 @@ int trouble;
                Without something like this, fix_all_troubles can get
                stuck in an infinite loop trying to fix STUCK_IN_WALL
                and repeatedly failing. */
-            set_itimeout(&HPasses_walls, (long) d(4, 4));
+            set_itimeout(&HPasses_walls, (long) (d(4, 4) + 4)); /* 8..20 */
             /* how else could you move between packed rocks or among
                lattice forming "solid" rock? */
             You_feel("much slimmer.");