diff --git a/datasette/views/table.py b/datasette/views/table.py
index fa2c80deae..ba0dd4f34e 100644
--- a/datasette/views/table.py
+++ b/datasette/views/table.py
@@ -364,7 +364,7 @@ async def _validate_data(self, request, db, table_name, pks, upsert):
         def _errors(errors):
             return None, errors, {}
 
-        if request.headers.get("content-type") != "application/json":
+        if not request.headers.get("content-type").startswith("application/json"):
             # TODO: handle form-encoded data
             return _errors(["Invalid content-type, must be application/json"])
         body = await request.post_body()