diff --git a/k8s_gitlab_borg/__main__.py b/k8s_gitlab_borg/__main__.py
index 255b3ef..29f8a08 100644
--- a/k8s_gitlab_borg/__main__.py
+++ b/k8s_gitlab_borg/__main__.py
@@ -484,7 +484,7 @@ def main():
                     pipe_buffer = b""
                     while pollc > 0 and len(events) > 0:
                         for rfd, event in events:
-                            logger.debug("rfd=%d, event=%b", rfd, event)
+                            logger.debug("rfd=%d, event=%x", rfd, event)
                             if event & select.POLLOUT:
                                 if rfd == proc.stdin.fileno():
                                     if chunk := pipe_buffer[:PIPE_BUF]: