diff --git a/MozillaFirefox.changes b/MozillaFirefox.changes
index 861a5de..04eb05f 100644
--- a/MozillaFirefox.changes
+++ b/MozillaFirefox.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Thu Mar 17 09:18:01 UTC 2022 - Martin Sirringhaus <martin.sirringhaus@suse.com>
+
+- Add cpu-flag `asimdrdm` to aarch64 constraints, to select newer,
+  faster buildhosts, as the others struggle to build FF.
+
 -------------------------------------------------------------------
 Tue Mar  8 10:27:16 UTC 2022 - Wolfgang Rosenauer <wr@rosenauer.org>
 
diff --git a/_constraints b/_constraints
index 9ebe972..3abe8d2 100644
--- a/_constraints
+++ b/_constraints
@@ -27,6 +27,18 @@
   <overwrite>
     <conditions>
       <arch>aarch64</arch>
+    </conditions>
+    <hardware>
+      <cpu>
+        <flag>asimdrdm</flag>
+      </cpu>
+      <physicalmemory>
+        <size unit="G">8</size>
+      </physicalmemory>
+    </hardware>
+  </overwrite>
+  <overwrite>
+    <conditions>
       <arch>ppc64le</arch>
       <arch>s390x</arch>
     </conditions>