diff --git a/dev-python/bsddb3/bsddb3-6.0.1.ebuild b/dev-python/bsddb3/bsddb3-6.0.1.ebuild
index 6dd979b20a5f8..a91443630746d 100644
--- a/dev-python/bsddb3/bsddb3-6.0.1.ebuild
+++ b/dev-python/bsddb3/bsddb3-6.0.1.ebuild
@@ -4,6 +4,7 @@
 
 EAPI=5
 PYTHON_COMPAT=( python{2_7,3_3,3_4} )
+PYTHON_REQ_USE="threads(+)"
 
 inherit db-use distutils-r1 multilib
 
diff --git a/dev-python/bsddb3/bsddb3-6.1.0.ebuild b/dev-python/bsddb3/bsddb3-6.1.0.ebuild
index 242147211b697..9381f1d6cc497 100644
--- a/dev-python/bsddb3/bsddb3-6.1.0.ebuild
+++ b/dev-python/bsddb3/bsddb3-6.1.0.ebuild
@@ -4,6 +4,7 @@
 
 EAPI=5
 PYTHON_COMPAT=( python{2_7,3_3,3_4} )
+PYTHON_REQ_USE="threads(+)"
 
 inherit db-use distutils-r1 multilib
 
diff --git a/dev-python/bsddb3/bsddb3-6.1.1.ebuild b/dev-python/bsddb3/bsddb3-6.1.1.ebuild
index ddebf811534d6..9bc15c7c0a9ea 100644
--- a/dev-python/bsddb3/bsddb3-6.1.1.ebuild
+++ b/dev-python/bsddb3/bsddb3-6.1.1.ebuild
@@ -5,6 +5,7 @@
 EAPI=5
 
 PYTHON_COMPAT=( python2_7 python3_{3,4,5} )
+PYTHON_REQ_USE="threads(+)"
 
 inherit db-use distutils-r1 multilib