diff --git a/dev-python/stdio-mgr/stdio-mgr-1.0.1.ebuild b/dev-python/stdio-mgr/stdio-mgr-1.0.1.ebuild
index 7218e21bc8..11b3b9167d 100644
--- a/dev-python/stdio-mgr/stdio-mgr-1.0.1.ebuild
+++ b/dev-python/stdio-mgr/stdio-mgr-1.0.1.ebuild
@@ -18,6 +18,8 @@ LICENSE="MIT"
 KEYWORDS="~amd64 ~x86 "
 SLOT="0"
 
+RDEPEND="dev-python/attrs[${PYTHON_USEDEP}]"
+
 distutils_enable_tests pytest
 # doc directory is not included in the release tarball for some reason
 #distutils_enable_sphinx doc \