diff --git a/NEWS b/NEWS
index c93464822..5702229b8 100644
--- a/NEWS
+++ b/NEWS
@@ -1,4 +1,4 @@
-1.1.16.dev0
+1.2.0
  * #61: Support for Borg --list option via borgmatic command-line to list all archives.
  * #61: Support for Borg --info option via borgmatic command-line to display summary information.
  * #62: Update README to mention other ways of installing borgmatic.
@@ -9,6 +9,8 @@
  * #60: Add "Persistent" flag to systemd timer example.
  * #63: Support for Borg --nobsdflags option to skip recording bsdflags (e.g. NODUMP, IMMUTABLE) in
    archive.
+ * #69: Support for Borg prune --umask option using value of existing "umask" option in borgmatic's
+   storage configuration.
  * Update tox.ini to only assume Python 3.x instead of Python 3.4 specifically.
  * Add ~/.config/borgmatic/config.yaml to default configuration path probing.
  * Document how to develop on and contribute to borgmatic.
diff --git a/borgmatic/borg/prune.py b/borgmatic/borg/prune.py
index c6e0ce6bd..09e1c9b3d 100644
--- a/borgmatic/borg/prune.py
+++ b/borgmatic/borg/prune.py
@@ -39,23 +39,27 @@ def prune_archives(verbosity, dry_run, repository, storage_config, retention_con
     retention config dict, prune Borg archives according to the retention policy specified in that
     configuration.
     '''
-    remote_path_flags = ('--remote-path', remote_path) if remote_path else ()
+    umask = storage_config.get('umask', None)
     lock_wait = storage_config.get('lock_wait', None)
-    lock_wait_flags = ('--lock-wait', str(lock_wait)) if lock_wait else ()
-    verbosity_flags = {
-        VERBOSITY_SOME: ('--info', '--stats',),
-        VERBOSITY_LOTS: ('--debug', '--stats', '--list'),
-    }.get(verbosity, ())
-    dry_run_flags = ('--dry-run',) if dry_run else ()
 
     full_command = (
-        local_path, 'prune',
-        repository,
-    ) + tuple(
-        element
-        for pair in _make_prune_flags(retention_config)
-        for element in pair
-    ) + remote_path_flags + lock_wait_flags + verbosity_flags + dry_run_flags
+        (
+            local_path, 'prune',
+            repository,
+        ) + tuple(
+            element
+            for pair in _make_prune_flags(retention_config)
+            for element in pair
+        )
+        + (('--remote-path', remote_path) if remote_path else ())
+        + (('--umask', str(umask)) if umask else ())
+        + (('--lock-wait', str(lock_wait)) if lock_wait else ())
+        + {
+            VERBOSITY_SOME: ('--info', '--stats',),
+            VERBOSITY_LOTS: ('--debug', '--stats', '--list'),
+        }.get(verbosity, ())
+        + (('--dry-run',) if dry_run else ())
+    )
 
     logger.debug(' '.join(full_command))
     subprocess.check_call(full_command)
diff --git a/borgmatic/tests/unit/borg/test_prune.py b/borgmatic/tests/unit/borg/test_prune.py
index 9289d0bf5..6e3a20df8 100644
--- a/borgmatic/tests/unit/borg/test_prune.py
+++ b/borgmatic/tests/unit/borg/test_prune.py
@@ -153,6 +153,23 @@ def test_prune_archives_with_remote_path_calls_borg_with_remote_path_parameters(
     )
 
 
+def test_prune_archives_with_umask_calls_borg_with_umask_parameters():
+    storage_config = {'umask': '077'}
+    retention_config = flexmock()
+    flexmock(module).should_receive('_make_prune_flags').with_args(retention_config).and_return(
+        BASE_PRUNE_FLAGS,
+    )
+    insert_subprocess_mock(PRUNE_COMMAND + ('--umask', '077'))
+
+    module.prune_archives(
+        verbosity=None,
+        dry_run=False,
+        repository='repo',
+        storage_config=storage_config,
+        retention_config=retention_config,
+    )
+
+
 def test_prune_archives_with_lock_wait_calls_borg_with_lock_wait_parameters():
     storage_config = {'lock_wait': 5}
     retention_config = flexmock()