diff --git a/src/uv-unix.c b/src/uv-unix.c
index 63ced961..bbc5a06c 100644
--- a/src/uv-unix.c
+++ b/src/uv-unix.c
@@ -2297,10 +2297,10 @@ int uv_spawn(uv_process_t* process, uv_process_options_t options) {
   if (pipe(signal_pipe) < 0) {
     goto error;
   }
-  uv__cloexec(signal_pipe[0]);
-  uv__cloexec(signal_pipe[1]);
-  uv__nonblock(signal_pipe[0]);
-  uv__nonblock(signal_pipe[1]);
+  uv__cloexec(signal_pipe[0], 1);
+  uv__cloexec(signal_pipe[1], 1);
+  uv__nonblock(signal_pipe[0], 1);
+  uv__nonblock(signal_pipe[1], 1);
 #endif
 
   pid = fork();