diff --git a/README.md b/README.md
index 6d58dc42..578c72fd 100644
--- a/README.md
+++ b/README.md
@@ -35,4 +35,5 @@ Parameters:
 	-cellid <#>				- the overridden CellID of the content server to download from.
 	-max-servers <#>		- maximum number of content servers to use. (default: 8).
 	-max-downloads <#>		- maximum number of chunks to download concurrently. (default: 4).
+	-loginid <#>            - a unique 32-bit integer Steam LogonID in decimal, required if running multiple instances of DepotDownloader concurrently.
 ```