diff --git a/metafacture-io/src/main/resources/flux-commands.properties b/metafacture-io/src/main/resources/flux-commands.properties
index 39540d47e..c9348185b 100644
--- a/metafacture-io/src/main/resources/flux-commands.properties
+++ b/metafacture-io/src/main/resources/flux-commands.properties
@@ -22,3 +22,4 @@ write org.metafacture.io.ObjectWriter
 as-records org.metafacture.io.RecordReader
 open-resource org.metafacture.io.ResourceOpener
 open-tar org.metafacture.io.TarReader
+open-stdin org.metafacture.io.StdInOpener