diff --git a/fhost.py b/fhost.py
index 1b9a4c7..ce48c03 100755
--- a/fhost.py
+++ b/fhost.py
@@ -143,7 +143,7 @@ def store_file(f, addr):
         if mime in app.config["FHOST_MIME_BLACKLIST"] or guessmime in app.config["FHOST_MIME_BLACKLIST"]:
             abort(415)
 
-        if mime.startswith("text/") and not "charset" in f.mime:
+        if mime.startswith("text/") and not "charset" in f.content_type:
             mime += "; charset=utf-8"
 
         ext = os.path.splitext(f.filename)[1]