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-rw-r--r--crawl-ref/source/abyss.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/crawl-ref/source/abyss.cc b/crawl-ref/source/abyss.cc
index 2ef221a30a..e3e850af08 100644
--- a/crawl-ref/source/abyss.cc
+++ b/crawl-ref/source/abyss.cc
@@ -231,7 +231,7 @@ static void _generate_area(int gx1, int gy1, int gx2, int gy2,
for (int i = gx1; i <= gx2; i++)
for (int j = gy1; j <= gy2; j++)
{
- if (grd[i][j] == DNGN_UNSEEN && random2(100) <= thickness)
+ if (grd[i][j] == DNGN_UNSEEN && x_chance_in_y(thickness + 1, 100))
{
grd[i][j] = DNGN_FLOOR;