diff --git a/src/internal/tpax_tmpfile_impl.c b/src/internal/tpax_tmpfile_impl.c
index b298ed0..a8e0c10 100644
--- a/src/internal/tpax_tmpfile_impl.c
+++ b/src/internal/tpax_tmpfile_impl.c
@@ -32,7 +32,7 @@ static int tpax_tmpfile_by_framework(void)
 static int tpax_tmpfile_by_kernel(void)
 {
 #ifdef O_TMPFILE
-	return open("/tmp",O_RDWR|O_TMPFILE|O_CLOEXEC,0);
+	return openat(AT_FDCWD,"/tmp",O_RDWR|O_TMPFILE|O_CLOEXEC,0);
 #else
 	return (-1);
 #endif