diff --git a/_constraints b/_constraints
new file mode 100644
index 0000000..1138b75
--- /dev/null
+++ b/_constraints
@@ -0,0 +1,13 @@
+<constraints>
+  <overwrite>
+    <conditions>
+      <arch>ppc64</arch>
+      <arch>ppc64le</arch>
+    </conditions>
+    <hardware>
+      <disk>
+        <size unit="M">5100</size>
+      </disk>
+    </hardware>
+  </overwrite>
+</constraints>
diff --git a/kst.changes b/kst.changes
index d06349f..2046825 100644
--- a/kst.changes
+++ b/kst.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Tue Jul 21 07:34:52 UTC 2020 - Michel Normand <normand@linux.vnet.ibm.com>
+
+- Add _constraints min disk space for PowerPC to avoid build error
+
 -------------------------------------------------------------------
 Thu Jan 16 10:58:00 UTC 2020 - Christophe Giboudeaux <christophe@krop.fr>