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-rw-r--r--crawl-ref/source/religion.cc6
1 files changed, 6 insertions, 0 deletions
diff --git a/crawl-ref/source/religion.cc b/crawl-ref/source/religion.cc
index ef0a7e602e..06976c4869 100644
--- a/crawl-ref/source/religion.cc
+++ b/crawl-ref/source/religion.cc
@@ -2399,6 +2399,9 @@ static void _dock_piety(int piety_loss, int penance)
void gain_piety(int pgn)
{
+ if (pgn <= 0)
+ return;
+
// Xom uses piety differently...
if (you.religion == GOD_XOM || you.religion == GOD_NO_GOD)
return;
@@ -2781,6 +2784,9 @@ bool trog_burn_books()
void lose_piety(int pgn)
{
+ if (pgn <= 0)
+ return;
+
const int old_piety = you.piety;
// Apply hysteresis