diff --git a/dev-python/quantities/quantities-0.12.4.ebuild b/dev-python/quantities/quantities-0.12.4.ebuild
index adb080068d..2a20bbc540 100644
--- a/dev-python/quantities/quantities-0.12.4.ebuild
+++ b/dev-python/quantities/quantities-0.12.4.ebuild
@@ -8,7 +8,7 @@ MY_PV="$(ver_cut 1-3)"
 MY_P="${MY_PN}-${PV}"
 S="${WORKDIR}/${MY_P}"
 
-PYTHON_COMPAT=( python3_{6,7,8} )
+PYTHON_COMPAT=( python3_{6,7,8,9} )
 DISTUTILS_USE_SETUPTOOLS=no
 
 inherit distutils-r1