diff --git a/dev-python/PyQt5-sip/PyQt5-sip-12.13.0-r1.ebuild b/dev-python/PyQt5-sip/PyQt5-sip-12.13.0-r1.ebuild
index 4731764f46ddd..02a93b200df67 100644
--- a/dev-python/PyQt5-sip/PyQt5-sip-12.13.0-r1.ebuild
+++ b/dev-python/PyQt5-sip/PyQt5-sip-12.13.0-r1.ebuild
@@ -7,6 +7,7 @@ DISTUTILS_EXT=1
 DISTUTILS_USE_PEP517=setuptools
 PYPI_NO_NORMALIZE=1
 PYPI_PN=${PN/-/_}
+# keep compat in sync with PyQt5 or else it confuses some revdeps
 PYTHON_COMPAT=( python3_{10..13} )
 inherit distutils-r1 pypi