1 files changed, 1 insertions, 1 deletions
diff --git a/rt/tst-aio64.c b/rt/tst-aio64.c
index 93e8cb2136..b6d964fd57 100644
--- a/rt/tst-aio64.c
+++ b/rt/tst-aio64.c
@@ -49,7 +49,7 @@ int fd;
 void
 do_prepare (int argc, char *argv[])
 {
-  char name_len;
+  size_t name_len;
 
   name_len = strlen (test_dir);
   name = malloc (name_len + sizeof ("/aioXXXXXX"));