diff --git a/zerver/lib/actions.py b/zerver/lib/actions.py
index 2653c0e382..8470b4f768 100644
--- a/zerver/lib/actions.py
+++ b/zerver/lib/actions.py
@@ -376,6 +376,10 @@ def do_deactivate_realm(realm):
         # notice when they try to log in.
         delete_user_sessions(user)
 
+def do_reactivate_realm(realm):
+    realm.deactivated = False
+    realm.save(update_fields=["deactivated"])
+
 def do_deactivate_user(user_profile, log=True, _cascade=True):
     if not user_profile.is_active:
         return
diff --git a/zerver/management/commands/reactivate_realm.py b/zerver/management/commands/reactivate_realm.py
new file mode 100644
index 0000000000..f38035ec08
--- /dev/null
+++ b/zerver/management/commands/reactivate_realm.py
@@ -0,0 +1,25 @@
+from __future__ import absolute_import
+from __future__ import print_function
+
+from django.core.management.base import BaseCommand
+
+import sys
+
+from zerver.lib.actions import do_reactivate_realm
+from zerver.models import get_realm
+
+class Command(BaseCommand):
+    help = """Script to reactivate a deactivated realm."""
+
+    def add_arguments(self, parser):
+        parser.add_argument('domain', metavar='<domain>', type=str,
+                            help='domain of realm to reactivate')
+
+    def handle(self, *args, **options):
+        realm = get_realm(options["domain"])
+        if realm is None:
+            print("Could not find realm %s" % (options["domain"],))
+            sys.exit(1)
+        print("Reactivating", options["domain"])
+        do_reactivate_realm(realm)
+        print("Done!")