diff --git a/_constraints b/_constraints
index d9c80a2..00fefab 100644
--- a/_constraints
+++ b/_constraints
@@ -23,9 +23,9 @@
       <arch>aarch64</arch>
     </conditions>
     <hardware>
-      <memory>
+      <physicalmemory>
         <size unit="G">5</size>
-      </memory>
+      </physicalmemory>
       <disk>
         <size unit="G">4</size>
       </disk>
diff --git a/libtorrent-rasterbar.changes b/libtorrent-rasterbar.changes
index 7cd700e..df7a190 100644
--- a/libtorrent-rasterbar.changes
+++ b/libtorrent-rasterbar.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Wed Sep 16 07:20:45 UTC 2020 - Michel Normand <normand@linux.vnet.ibm.com>
+
+- in _constraints set 5GB min physicalmemory rather than memory parm
+  (at least required for ppc64/ppc64le)
+
 -------------------------------------------------------------------
 Wed Sep  9 08:24:41 UTC 2020 - Luigi Baldoni <aloisio@gmx.com>