diff --git a/doc/main.md b/doc/main.md
index b46438e..fb48070 100644
--- a/doc/main.md
+++ b/doc/main.md
@@ -1,3 +1,4 @@
 EPANET OSS  {#mainpage}
 ==========
 
+Most of the API documentation of interest in in epanet2.h
\ No newline at end of file