diff --git a/REFERENCE.md b/REFERENCE.md
index e229573..148d05c 100644
--- a/REFERENCE.md
+++ b/REFERENCE.md
@@ -288,7 +288,7 @@ Variant[Pattern[/^file:\/\//],
   ]
 ```
 
-Source of Wildfly tarball installer.
+Custom source of Wildfly tarball installer. Defaults to standard Wildfly repositories.
 
 Default value: `undef`
 
diff --git a/manifests/init.pp b/manifests/init.pp
index 950b4f5..fd73dad 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -17,7 +17,7 @@
 # @param install_cache_dir The directory to be used for wget cache.
 # @param deploy_cache_dir The directory to be used for deployment cache.
 # @param install_download_timeout Sets the timeout for installer download.
-# @param install_source Source of Wildfly tarball installer.
+# @param install_source Custom source of Wildfly tarball installer. Defaults to standard Wildfly repositories.
 # @param java_home Sets the `JAVA_HOME` for Wildfly.
 # @param java_opts Sets `JAVA_OPTS`, allowing to override several Java params, like `Xmx`, `Xms` and `MaxMetaspaceSize`,
 # @param java_xmx Sets Java's `-Xmx` parameter.