diff --git a/src/github.com/matrix-org/dendrite/mediaapi/config/config.go b/src/github.com/matrix-org/dendrite/mediaapi/config/config.go
index 86b5c75ba..0cfb58401 100644
--- a/src/github.com/matrix-org/dendrite/mediaapi/config/config.go
+++ b/src/github.com/matrix-org/dendrite/mediaapi/config/config.go
@@ -27,7 +27,7 @@ type MediaAPI struct {
 	BasePath types.Path `yaml:"base_path"`
 	// The maximum file size in bytes that is allowed to be stored on this server.
 	// Note that remote files larger than this can still be proxied to a client, they will just not be cached.
-	MaxFileSizeBytes types.ContentLength `yaml:"base_path"`
+	MaxFileSizeBytes types.ContentLength `yaml:"max_file_size_bytes"`
 	// The postgres connection config for connecting to the database e.g a postgres:// URI
 	DataSource string `yaml:"database"`
 }