diff --git a/src/assuan-support.c b/src/assuan-support.c
index 925aebaf..09db3295 100644
--- a/src/assuan-support.c
+++ b/src/assuan-support.c
@@ -234,7 +234,7 @@ my_spawn (assuan_context_t ctx, pid_t *r_pid, const char *name,
                   break;
                 }
               logger_fd = strtol (argv[loc], &tail, 10);
-              if (tail == argv[loc] || logger_fd <= 0)
+              if (tail == argv[loc] || logger_fd < 0)
                 {
                   err = GPG_ERR_INV_ARG;
                   break;