diff --git a/src/ecoisundertaxon.c b/src/ecoisundertaxon.c
index f850efc..7a19a7b 100644
--- a/src/ecoisundertaxon.c
+++ b/src/ecoisundertaxon.c
@@ -26,16 +26,12 @@ int main(int argc, char **argv){
 		
 	taxonomy = read_taxonomy(argv[optind]);
 	
-	son = eco_findtaxonbytaxid(taxonomy, taxid_2);
-
-	//printf("# %s\n",son->parent->name);
+	son = eco_findtaxonbytaxid(taxonomy, taxid_1);
 	
-	/*	
-	if (eco_isundertaxon(son, tax_id_2))
-		printf("tax_id_1 is son of tax_id_2");
+	if (eco_isundertaxon(son, taxid_2))
+		printf("taxid_1 (%d) is son of taxid_2 (%d)\n",taxid_1, taxid_2);
 	else
-		printf("tax_id_1 is NOT son of tax_id_2");
-	*/
+		printf("taxid_1 (%d) is NOT son of taxid_2 (%d)\n",taxid_1, taxid_2);
 	
 	return 0;
 }
\ No newline at end of file