diff --git a/_constraints b/_constraints
new file mode 100644
index 0000000..6996f8f
--- /dev/null
+++ b/_constraints
@@ -0,0 +1,12 @@
+<constraints>
+  <overwrite>
+    <conditions>
+      <arch>riscv64</arch>
+    </conditions>
+    <hardware>
+      <memory>
+        <size unit="G">15</size>
+      </memory>
+    </hardware>
+  </overwrite>
+</constraints>
diff --git a/alex.changes b/alex.changes
index f823497..9c6d288 100644
--- a/alex.changes
+++ b/alex.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Wed Oct 21 12:51:40 UTC 2020 - Andreas Schwab <schwab@suse.de>
+
+- Add memory constraints for riscv64
+
 -------------------------------------------------------------------
 Tue Aug 18 10:43:42 UTC 2020 - Peter Simons <psimons@suse.com>