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-rw-r--r--alc/hrtf.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/alc/hrtf.cpp b/alc/hrtf.cpp
index 30e14b8b..a36e4bcc 100644
--- a/alc/hrtf.cpp
+++ b/alc/hrtf.cpp
@@ -26,6 +26,7 @@
#include <array>
#include <cassert>
#include <cctype>
+#include <cmath>
#include <cstdint>
#include <cstdio>
#include <cstring>