diff --git a/tcli/__main__.py b/tcli/__main__.py
index 183ec5b..ebfcf67 100644
--- a/tcli/__main__.py
+++ b/tcli/__main__.py
@@ -266,14 +266,14 @@ def do_post(
                 parent_blogname=reblog_parent,
                 id=reblog,
                 content=content,
-                tags=",".join(tags),
+                tags=tags,
                 media_sources=media_sources,
             )
         else:
             response = tumblr.create_post(
                 config["blog"],
                 content=content,
-                tags=",".join(tags),
+                tags=tags,
                 media_sources=media_sources,
             )
         print("Got response:")