diff --git a/sent.c b/sent.c
index 6b22e61..e717a69 100644
--- a/sent.c
+++ b/sent.c
@@ -386,6 +386,8 @@ void eprintf(const char *fmt, ...)
 {
 	va_list ap;
 
+	fputs("sent: ", stderr);
+
 	va_start(ap, fmt);
 	vfprintf(stderr, fmt, ap);
 	va_end(ap);