diff --git a/components/gameplay/autocalc.cpp b/components/gameplay/autocalc.cpp
index a1888c434f..fbfc4a0204 100644
--- a/components/gameplay/autocalc.cpp
+++ b/components/gameplay/autocalc.cpp
@@ -1,5 +1,7 @@
 #include "autocalc.hpp"
 
+#include <cmath>
+
 #include <components/esm/attr.hpp>
 #include <components/esm/loadmgef.hpp>
 #include <components/esm/loadskil.hpp>