diff --git a/thunderbird.spec b/thunderbird.spec
index 773830a..592d9da 100644
--- a/thunderbird.spec
+++ b/thunderbird.spec
@@ -1,3 +1,6 @@
+# Disabled arm due to rhbz#1658940
+ExcludeArch: armv7hl
+
 # Disabled due to https://pagure.io/fedora-infrastructure/issue/7581
 ExcludeArch: s390x