diff --git a/master/buildbot/steps/source/base.py b/master/buildbot/steps/source/base.py
index ea755415928..b2a1c3f8934 100644
--- a/master/buildbot/steps/source/base.py
+++ b/master/buildbot/steps/source/base.py
@@ -36,7 +36,7 @@ class Source(LoggingBuildStep, CompositeStepMixin):
     """
 
     renderables = ['description', 'descriptionDone', 'descriptionSuffix',
-                   'workdir']
+                   'workdir', 'env']
 
     description = None  # set this to a list of short strings to override
     descriptionDone = None  # alternate description when the step is complete
diff --git a/master/docs/relnotes/index.rst b/master/docs/relnotes/index.rst
index 30eb05dab20..177b7042c7f 100644
--- a/master/docs/relnotes/index.rst
+++ b/master/docs/relnotes/index.rst
@@ -143,6 +143,8 @@ Fixes
 
 * The web status no longer relies on the current working directory, which is not set correctly by some initscripts, to find the ``templates/`` directory (:bb:bug:`2586`).
 
+* The source steps now correctly interpolate properties in ``env``.
+
 Deprecations, Removals, and Non-Compatible Changes
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~