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-rw-r--r--crawl-ref/source/decks.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/crawl-ref/source/decks.cc b/crawl-ref/source/decks.cc
index de5e5c5a62..6298404b97 100644
--- a/crawl-ref/source/decks.cc
+++ b/crawl-ref/source/decks.cc
@@ -2225,7 +2225,7 @@ static void _deepen_water(const coord_def& center, int radius)
const coord_def p = *ri;
if (grd(p) == DNGN_SHALLOW_WATER
&& p != you.pos()
- && random2(8) < 1 + count_neighbours(p.x, p.y, DNGN_DEEP_WATER))
+ && x_chance_in_y(1+count_neighbours(p.x, p.y, DNGN_DEEP_WATER), 8))
{
dungeon_terrain_changed(p, DNGN_DEEP_WATER);
}