diff --git a/_github b/_github
index f9c715c..1bf4e3d 100644
--- a/_github
+++ b/_github
@@ -168,8 +168,11 @@ _github() {
           && ret=0
         ;;
         (pull)
-          # TODO Not implemented
-          _message "${words[1]} command argument" && ret=0
+          _arguments \
+            '1: :_github_users' \
+            '2: :_github_branches' \
+            '--merge[automatically merge remote'\''s changes into your master]' \
+          && ret=0
         ;;
         (pull-request)
           # TODO Not implemented