Potential fix for softfork guard issue #1962

Job	Run time
Checks	53s
Wheel on macos-13 py-3.8	3m 52s
Wheel on ubuntu-latest py-3.8	2m 58s
Run fuzz targets (macos-13, 3.8)	24m 13s
Wheel on windows-latest py-3.8	2m 50s
Unit tests (macos-13, 3.8)	10m 48s
Run fuzz targets (ubuntu-latest, 3.8)	14m 12s
Unit tests (ubuntu-latest, 3.8)	3m 31s
Unit tests (windows-latest, 3.8)	6m 26s
coverage	8m 27s
Upload to PyPI	42s
	1h 18m 52s

Provide feedback