--- tenacity-git-b26932aa2.old/libraries/lib-nyquist-effects/NyquistBase.cpp
+++ tenacity-git-b26932aa2/libraries/lib-nyquist-effects/NyquistBase.cpp
@@ -1304,7 +1304,7 @@
          auto pair = WaveChannelUtilities::GetMinMax(
             *mCurTrack[i], mT0, mT1); // may throw
          min = pair.first, max = pair.second;
-         maxPeak = std::max(std::max(fabs(min), fabs(max)), maxPeak);
+         maxPeak = std::max(std::max(std::fabs(min), std::fabs(max)), maxPeak);
          maxPeakLevel = std::max(maxPeakLevel, maxPeak);
 
          // On Debian, NaN samples give maxPeak = 3.40282e+38 (FLT_MAX)