diff --git a/src/cloud/occi/etc/templates/custom.erb b/src/cloud/occi/etc/templates/custom.erb
index 2b91f543e6..f000a411c1 100644
--- a/src/cloud/occi/etc/templates/custom.erb
+++ b/src/cloud/occi/etc/templates/custom.erb
@@ -4,5 +4,11 @@
 #  You can also add specific attributes for your cloud in this file (e.g. OS).
 #
 
-CPU    = "<%= @vm_info['CPU'] %>"
-MEMORY = "<%= @vm_info['MEMORY'] %>"
\ No newline at end of file
+# Default values for VM capacity
+<%
+  DEFAULT_CPU = 1
+  DEFAULT_MEMORY = 128
+%>
+
+CPU    = "<%= @vm_info['CPU'].nil? ? DEFAULT_CPU : @vm_info['CPU'] %>"
+MEMORY = "<%= @vm_info['MEMORY'].nil? ? DEFAULT_MEMORY : @vm_info['MEMORY'] %>"