diff --git a/test/notmuch-test.h b/test/notmuch-test.h
index d39febbe..45d03d67 100644
--- a/test/notmuch-test.h
+++ b/test/notmuch-test.h
@@ -7,7 +7,7 @@ inline static void
 expect0(int line, notmuch_status_t ret)
 {
    if (ret) {
-	fprintf (stderr, "line %d: %s\n", line, ret);
+	fprintf (stderr, "line %d: %d\n", line, ret);
 	exit (1);
    }
 }