diff --git a/dev-python/pyopenssl/pyopenssl-0.14.ebuild b/dev-python/pyopenssl/pyopenssl-0.14.ebuild
index 8115f054147f8..c567862543de1 100644
--- a/dev-python/pyopenssl/pyopenssl-0.14.ebuild
+++ b/dev-python/pyopenssl/pyopenssl-0.14.ebuild
@@ -4,6 +4,7 @@
 
 EAPI=5
 PYTHON_COMPAT=( python{2_7,3_3,3_4} pypy )
+PYTHON_REQ_USE="threads(+)"
 
 inherit distutils-r1 flag-o-matic
 
diff --git a/dev-python/pyopenssl/pyopenssl-0.15.1.ebuild b/dev-python/pyopenssl/pyopenssl-0.15.1.ebuild
index 6fb281dddf018..c381cb981dfcc 100644
--- a/dev-python/pyopenssl/pyopenssl-0.15.1.ebuild
+++ b/dev-python/pyopenssl/pyopenssl-0.15.1.ebuild
@@ -5,6 +5,7 @@
 EAPI=5
 
 PYTHON_COMPAT=( python2_7 python3_{3,4,5} pypy )
+PYTHON_REQ_USE="threads(+)"
 
 inherit distutils-r1 flag-o-matic