diff --git a/src/unix/core.c b/src/unix/core.c
index 5a8987e7..51318be8 100644
--- a/src/unix/core.c
+++ b/src/unix/core.c
@@ -433,7 +433,7 @@ FILE* uv__open_file(const char* path) {
   FILE* fp;
 
   fd = uv__open_cloexec(path, O_RDONLY);
-  if (fd == -1)
+  if (fd < 0)
     return NULL;
 
    fp = fdopen(fd, "r");