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-rw-r--r--src/sound/win32_s.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/sound/win32_s.cpp b/src/sound/win32_s.cpp
index ef3f98f40..d241f45c8 100644
--- a/src/sound/win32_s.cpp
+++ b/src/sound/win32_s.cpp
@@ -15,6 +15,7 @@
#include "../mixer.h"
#include "../core/alloc_func.hpp"
#include "../core/bitmath_func.hpp"
+#include "../core/math_func.hpp"
#include "win32_s.h"
#include <windows.h>
#include <mmsystem.h>