diff --git a/adwaita-qt.spec b/adwaita-qt.spec
index 599be30..b353e9f 100644
--- a/adwaita-qt.spec
+++ b/adwaita-qt.spec
@@ -1,3 +1,6 @@
+# FIXME: qt6-qtdeclarative doesn't build on S390x
+# BUG: https://bugreports.qt.io/browse/QTBUG-93101
+ExcludeArch: s390x
 
 Name:           adwaita-qt
 Version:        1.4.1