diff --git a/stdlib/paths.c b/stdlib/paths.c
index 8dfef08..c774375 100644
--- a/stdlib/paths.c
+++ b/stdlib/paths.c
@@ -527,6 +527,7 @@ public Path_t Path$write_unique_bytes(Path_t path, Array_t bytes)
     ssize_t written = write(fd, bytes.data, (size_t)bytes.length);
     if (written != (ssize_t)bytes.length)
         fail("Could not write to file: %s\n%s", buf, strerror(errno));
+    close(fd);
     return Path$from_str(buf);
 }