diff --git a/racket/src/racket/src/port.c b/racket/src/racket/src/port.c
index b71c6e1b5b..7a74cb3632 100644
--- a/racket/src/racket/src/port.c
+++ b/racket/src/racket/src/port.c
@@ -5990,7 +5990,7 @@ static Scheme_Object *do_subprocess_kill(Scheme_Object *_sp, Scheme_Object *kill
   if (!ok) {
     if (can_error)
       scheme_raise_exn(MZEXN_FAIL, 
-                       "Subprocess-kill: operation failed\n"
+                       "subprocess-kill: operation failed\n"
                        "  system error: %R");
   }