diff --git a/bin/ansible-doc b/bin/ansible-doc
index a77fff8130..9faff67507 100755
--- a/bin/ansible-doc
+++ b/bin/ansible-doc
@@ -113,6 +113,9 @@ def get_man_text(doc):
         if 'choices' in opt:
             choices = ", ".join(str(i) for i in opt['choices'])
             desc = desc + " (Choices: " + choices + ")"
+        if 'default' in opt:
+            default = str(opt['default'])
+            desc = desc + " [Default: " + default + "]"
         text.append("%s\n" % textwrap.fill(tty_ify(desc), initial_indent=opt_indent,
                              subsequent_indent=opt_indent))
 
diff --git a/library/system/ufw b/library/system/ufw
index 40bbb313ed..e917a3bc74 100644
--- a/library/system/ufw
+++ b/library/system/ufw
@@ -108,6 +108,11 @@ options:
       - Delete rule.
     required: false
     choices: ['yes', 'no']
+  interface:
+    description:
+      - Specify interface for rule.
+    required: false
+    aliases: ['if']
 '''
 
 EXAMPLES = '''