diff --git a/src/ecoisundertaxon.c b/src/ecoisundertaxon.c
index 31211e8..1e41659 100644
--- a/src/ecoisundertaxon.c
+++ b/src/ecoisundertaxon.c
@@ -104,7 +104,7 @@ int main(int argc, char **argv){
     if (errflag)
     	ExitUsage(errflag);
   		
-	taxonomy = read_taxonomy(argv[optind]);
+	taxonomy = read_taxonomy(argv[optind],0);
 	
 	son = eco_findtaxonbytaxid(taxonomy, taxid_1);