diff --git a/src/main/java/fiji/plugin/trackmate/util/cli/CLIConfigurator.java b/src/main/java/fiji/plugin/trackmate/util/cli/CLIConfigurator.java
index 0eaa0d9a1..d1862a70c 100644
--- a/src/main/java/fiji/plugin/trackmate/util/cli/CLIConfigurator.java
+++ b/src/main/java/fiji/plugin/trackmate/util/cli/CLIConfigurator.java
@@ -1061,7 +1061,8 @@ public void setValueObject( final Object val )
 				throw new IllegalArgumentException( "Argument '" + name + "' expects String. Got " + val.getClass().getSimpleName() );
 
 			final String v = ( ( String ) val );
-			set( v );
+			if ( envs.contains( v ) )
+				set( v );
 		}
 
 		@Override