diff --git a/src/libecoPCR/ecotax.c b/src/libecoPCR/ecotax.c
index 2a39367..e7df2e6 100644
--- a/src/libecoPCR/ecotax.c
+++ b/src/libecoPCR/ecotax.c
@@ -32,7 +32,7 @@ ecotxidx_t     *read_taxonomyidx(const char *filename,const char *filename2)
 	fprintf(stderr,"Reading %d taxa...\n",count);
 	for (i=0; i < count; i++){
 		readnext_ecotaxon(f,&(index->taxon[i]));
-		index->taxon[i].parent=index->taxon + (int64_t)index->taxon[i].parent;
+		index->taxon[i].parent=index->taxon + (int32_t)index->taxon[i].parent;
 	}
 
 	if (count2>0)
@@ -42,7 +42,7 @@ ecotxidx_t     *read_taxonomyidx(const char *filename,const char *filename2)
 
 	for (i=0; i < count2; i++){
 		readnext_ecotaxon(f2,&(index->taxon[count+i]));
-		index->taxon[count+i].parent=index->taxon + (int64_t)index->taxon[count+i].parent;
+		index->taxon[count+i].parent=index->taxon + (int32_t)index->taxon[count+i].parent;
 	}
 
 	return index;
@@ -112,7 +112,7 @@ ecotx_t *readnext_ecotaxon(FILE *f,ecotx_t *taxon)
 		raw->taxid      = swap_int32_t(raw->taxid);
 	}
 
-	taxon->parent = (ecotx_t*)(size_t)raw->parent;
+	taxon->parent = (ecotx_t*)raw->parent;
 	taxon->taxid  = raw->taxid;
 	taxon->rank   = raw->rank;
 
@@ -133,14 +133,14 @@ ecotaxonomy_t    *read_taxonomy(const char *prefix,int32_t readAlternativeName)
 	int           buffsize;
 
 	tax = ECOMALLOC(sizeof(ecotaxonomy_t),
-					"Allocate taxonomy structure");
+	                "Allocate taxonomy structure");
 
 	buffsize = strlen(prefix)+10;
 
 	filename = ECOMALLOC(buffsize,
-						 "Allocate filename");
+	                     "Allocate filename");
 	filename2= ECOMALLOC(buffsize,
-						 "Allocate filename");
+	                     "Allocate filename");
 
 	snprintf(filename,buffsize,"%s.rdx",prefix);
 
@@ -153,12 +153,13 @@ ecotaxonomy_t    *read_taxonomy(const char *prefix,int32_t readAlternativeName)
 
 	if (readAlternativeName)
 	{
-	   snprintf(filename,buffsize,"%s.ndx",prefix);
+  	   snprintf(filename,buffsize,"%s.ndx",prefix);
 	   tax->names=read_nameidx(filename,tax);
 	}
 	else
 	   tax->names=NULL;
 	return tax;
+
 }
 
 
@@ -340,6 +341,9 @@ ecotx_t *eco_getsuperkingdom(ecotx_t *taxon,
 	if (taxonomy && tax!=taxonomy)
 	{
 		rankindex = rank_index("superkingdom",taxonomy->ranks);
+                if (rankindex < 0) {
+		   rankindex = rank_index("domain",taxonomy->ranks);
+                }
 		tax=taxonomy;
 	}