Index: security/Makefile
===================================================================
--- security/Makefile
+++ security/Makefile
@@ -973,6 +973,7 @@
     SUBDIR += py-zxcvbn-python
     SUBDIR += py3-certifi
     SUBDIR += py3-cryptography
+    SUBDIR += py3-ecdsa
     SUBDIR += py3-libnacl
     SUBDIR += py3-openssl
     SUBDIR += py3-pycrypto
Index: security/py-ecdsa/Makefile
===================================================================
--- security/py-ecdsa/Makefile
+++ security/py-ecdsa/Makefile
@@ -13,7 +13,7 @@
 
 LICENSE=	MIT
 
-USES=		python
+USES?=		python
 USE_PYTHON=	distutils autoplist
 
 regression-test: build
Index: security/py3-ecdsa/Makefile
===================================================================
--- /dev/null
+++ security/py3-ecdsa/Makefile
@@ -0,0 +1,7 @@
+# $FreeBSD$
+
+MASTERDIR=	${.CURDIR}/../py-ecdsa
+
+USES=		python:3.2+
+
+.include "${MASTERDIR}/Makefile"