1 files changed, 1 insertions, 1 deletions
diff --git a/src/uio.hh b/src/uio.hh
index 8a55f03..091d0ce 100644
--- a/src/uio.hh
+++ b/src/uio.hh
@@ -9,7 +9,7 @@
 
 namespace u {
 
-enum class ReaderInputFormat {
+enum class ReaderInputFormat : uint8_t {
   UTF8,
   UTF16_BE,
   UTF16_LE,