1 files changed, 1 insertions, 1 deletions

diff --git a/infra/port.h b/infra/port.h
index 06a3aa5..bdc31b4 100644
--- a/infra/port.h
+++ b/infra/port.h
@@ -21,7 +21,7 @@ namespace infra {
             return x;
         }
 
-        const T & peek() {
+        T & peek() {
             assert(can_read());
             return *consumer_side;
         }