| diff --git a/third_party/agg23/agg_basics.h b/third_party/agg23/agg_basics.h | |
| index eb6f35686..e7583e308 100644 | |
| --- a/third_party/agg23/agg_basics.h | |
| +++ b/third_party/agg23/agg_basics.h | |
| @@ -41,6 +41,7 @@ | |
| #endif | |
| #define AGG_INLINE inline | |
| +#include <math.h> | |
| #include "core/fxcrt/fx_system.h" | |
| namespace pdfium |