diff --git a/racket/src/rktio/rktio_private.h b/racket/src/rktio/rktio_private.h
index c063f381d1..02cd3e2d43 100644
--- a/racket/src/rktio/rktio_private.h
+++ b/racket/src/rktio/rktio_private.h
@@ -303,8 +303,8 @@ intptr_t rktio_hash_string(const char *s);
 /* On Mac OS, for example, `read` and `write` expect a value less than
    2GB. Use 32MB as a limit that is very large, but still likely small
    enough for all OSes. */
-#define MAX_READ_WRITE_REQUESST_BYTES (32 * 1048576)
-#define LIMIT_REQUEST_SIZE(n) (((n) > MAX_READ_WRITE_REQUESST_BYTES) ? MAX_READ_WRITE_REQUESST_BYTES : (n))
+#define MAX_READ_WRITE_REQUEST_BYTES (32 * 1048576)
+#define LIMIT_REQUEST_SIZE(n) (((n) > MAX_READ_WRITE_REQUEST_BYTES) ? MAX_READ_WRITE_REQUEST_BYTES : (n))
 
 void rktio_get_posix_error(rktio_t *rktio);
 #define get_posix_error() rktio_get_posix_error(rktio)