diff -Naur source-old/higan/fc/ppu/ppu.cpp source-new/higan/fc/ppu/ppu.cpp
--- source-old/higan/fc/ppu/ppu.cpp	1969-12-31 21:00:01.000000000 -0300
+++ source-new/higan/fc/ppu/ppu.cpp	2021-09-29 22:23:19.107527772 -0300
@@ -1,3 +1,4 @@
+#include <cmath>
 #include <fc/fc.hpp>
 
 namespace higan::Famicom {