diff --git a/docs/src/index.md b/docs/src/index.md
index 2575ee8a627c0854b713aa6b68fd5619bcfe4d1a..2683905a8f4c1cae89d875e57db30cde0afcbd3a 100644
--- a/docs/src/index.md
+++ b/docs/src/index.md
@@ -6,7 +6,7 @@ library.
 Manually add a docstring here:
 
 ```@docs
-CaosDB.Utility.get_env_var(var, default)
+CaosDB.Utility.get_env_var(::AbstractString, ::AbstractString)
 ```