diff --git a/csharp/ql/lib/ext/NHibernate.model.yml b/csharp/ql/lib/ext/NHibernate.model.yml
new file mode 100644
index 00000000000..472374cfbc3
--- /dev/null
+++ b/csharp/ql/lib/ext/NHibernate.model.yml
@@ -0,0 +1,8 @@
+extensions:
+  - addsTo:
+      pack: codeql/csharp-all
+      extensible: sinkModel
+    data:
+      - ["NHibernate", "ISession", True, "CreateSQLQuery", "(System.String)", "", "Argument[0]", "sql-injection", "manual"]
+      - ["NHibernate", "IStatelessSession", True, "CreateSQLQuery", "(System.String)", "", "Argument[0]", "sql-injection", "manual"]
+      - ["NHibernate.Impl", "AbstractSessionImpl", True, "CreateSQLQuery", "(System.String)", "", "Argument[0]", "sql-injection", "manual"]
\ No newline at end of file