diff --git a/tutorials/20_env_variables.md b/tutorials/20_env_variables.md
index 9b9b5b3b3..63e541c46 100644
--- a/tutorials/20_env_variables.md
+++ b/tutorials/20_env_variables.md
@@ -21,6 +21,9 @@ Below are descriptions of the available environment variables:
     the search of the topic/service.
 * **IGN_PARTITION**
     * *Value allowed*: Any partition value
+    * *Default value*: `<HOSTNAME>:<USERNAME>` where `<HOSTNAME>` is the 
+    hostname of the current machine and `<USERNAME>` is the name of the
+    user launching the node.
     * *Description*: Specifies a partition name for all the nodes declared
     inside this process. Note that an alternative partition name  declared
     programatically and  passed to the constructor of a Node class will take