diff --git a/dev-python/lockfile/lockfile-0.10.2.ebuild b/dev-python/lockfile/lockfile-0.10.2.ebuild
index 288009bf39ef6..2a15a74d817a9 100644
--- a/dev-python/lockfile/lockfile-0.10.2.ebuild
+++ b/dev-python/lockfile/lockfile-0.10.2.ebuild
@@ -5,6 +5,7 @@
 EAPI=5
 
 PYTHON_COMPAT=( python2_7 python3_{3,4,5} pypy pypy3 )
+PYTHON_REQ_USE="threads(+)"
 
 inherit distutils-r1
 
diff --git a/dev-python/lockfile/lockfile-0.11.0-r1.ebuild b/dev-python/lockfile/lockfile-0.11.0-r1.ebuild
index 4ca3e73ddd447..39f35008625ae 100644
--- a/dev-python/lockfile/lockfile-0.11.0-r1.ebuild
+++ b/dev-python/lockfile/lockfile-0.11.0-r1.ebuild
@@ -5,6 +5,7 @@
 EAPI=5
 
 PYTHON_COMPAT=( python2_7 python3_{3,4,5} pypy pypy3 )
+PYTHON_REQ_USE="threads(+)"
 
 inherit distutils-r1
 
diff --git a/dev-python/lockfile/lockfile-0.9.1-r1.ebuild b/dev-python/lockfile/lockfile-0.9.1-r1.ebuild
index 321426e181b98..c05a8b0b30866 100644
--- a/dev-python/lockfile/lockfile-0.9.1-r1.ebuild
+++ b/dev-python/lockfile/lockfile-0.9.1-r1.ebuild
@@ -5,6 +5,7 @@
 EAPI=5
 # py2.5 dropped; Test file reveals py2.5 can't support a core file
 PYTHON_COMPAT=( python{2_7,3_3,3_4} pypy )
+PYTHON_REQ_USE="threads(+)"
 
 inherit distutils-r1