diff --git a/src/Assistants/BasicAudioSpec.hpp b/src/Assistants/BasicAudioSpec.hpp
index 66a4f3b..a0ccd6d 100644
--- a/src/Assistants/BasicAudioSpec.hpp
+++ b/src/Assistants/BasicAudioSpec.hpp
@@ -7,6 +7,7 @@
 #pragma once
 
 #include <span>
+#include <cmath>
 #include <vector>
 #include <utility>
 #include <algorithm>
@@ -94,7 +95,7 @@ class AudioSpecBlock {
 	auto getVolumeNorm() const noexcept { return mVolume / 255.0f; }
 
 	auto getSampleRate(f32 framerate) const noexcept {
-		return std::fabs(framerate) > 1e-6f ? mSpec.freq / framerate : 0.0f;
+		return std::abs(framerate) > 1e-6f ? mSpec.freq / framerate : 0.0f;
 	}
 
 	void setVolume(s32 value) noexcept {