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-rw-r--r--crawl-ref/source/effects.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/crawl-ref/source/effects.cc b/crawl-ref/source/effects.cc
index 6c4dc207bc..975cd9b593 100644
--- a/crawl-ref/source/effects.cc
+++ b/crawl-ref/source/effects.cc
@@ -4196,7 +4196,7 @@ struct greater_second
// out which arc the input point pos falls on.
static int _arc_decomposition(const coord_def & pos, int n_arcs)
{
- float theta = atan2(pos.y, pos.x);
+ float theta = atan2((float)pos.y, (float)pos.x);
if (pos.x == 0 && pos.y != 0)
theta = pos.y > 0 ? PI / 2 : -PI / 2;