diff --git a/DOC/create_fact.md b/DOC/create_fact.md
index 736b09e524d11b20fccc3eed7b1b517d4a4fdc20..802d2dec45a24978576d5c10df809be73418e6d6 100644
--- a/DOC/create_fact.md
+++ b/DOC/create_fact.md
@@ -11,6 +11,7 @@
     <br>
 
     1. 	A constructor that calls base(). Constructor can have SomDoc, which is the MMT URI as OMS.
+        Only set the ServerDefinition inside the constructor if you have a good reason to.
 
     2. 	define: A method parseFact(List<Fact> ret, MMTFact fact). 
             convert MMTFact fact to Unity Fact and add it to the List<Fact> ret