diff --git a/_constraints b/_constraints
index 3fa17cc..1f52539 100644
--- a/_constraints
+++ b/_constraints
@@ -4,6 +4,9 @@
     <physicalmemory>
       <size unit="M">2000</size>
     </physicalmemory>
+    <disk>
+      <size unit="G">5</size>
+    </disk>
   </hardware>
   <sandbox>kvm</sandbox>
   <hostlabel exclude="true">SLOW_CPU</hostlabel>
diff --git a/boost.changes b/boost.changes
index 9869547..28a1ff4 100644
--- a/boost.changes
+++ b/boost.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Tue Jul 22 13:52:26 UTC 2014 - fcrozat@suse.com
+
+- Ensure there is enough disk space available for build.
+
 -------------------------------------------------------------------
 Tue Jul 22 12:22:13 UTC 2014 - fcrozat@suse.com