diff --git a/src/emucore/tia/frame-manager/FrameManager.hxx b/src/emucore/tia/frame-manager/FrameManager.hxx
index 092c68ca8..9693d42c4 100644
--- a/src/emucore/tia/frame-manager/FrameManager.hxx
+++ b/src/emucore/tia/frame-manager/FrameManager.hxx
@@ -34,7 +34,8 @@ class FrameManager: public AbstractFrameManager {
       frameSizePAL = 312,
       baseHeightNTSC = 228, // 217..239
       baseHeightPAL = 274, // 260..288
-      maxHeight = static_cast<uInt32>(baseHeightPAL * 1.05 + 0.5), // 288   FIXME
+      // NOLINTNEXTLINE: lround suggested, but not constexpr until C++23
+      maxHeight = static_cast<uInt32>(baseHeightPAL * 1.05 + 0.5), // 288
       maxLinesVsync = 50,
       initialGarbageFrames = TIAConstants::initialGarbageFrames,
       ystartNTSC = 23,