diff --git a/qurator/eynollah/utils/counter.py b/qurator/eynollah/utils/counter.py
index 5280c6f..6bd9d7d 100644
--- a/qurator/eynollah/utils/counter.py
+++ b/qurator/eynollah/utils/counter.py
@@ -20,14 +20,14 @@ class EynollahIdCounter():
         self._counter[name] = val
 
     def region_id(self, region_idx=None):
-        if not region_idx:
+        if region_idx is None:
             region_idx = self._counter['region']
         return REGION_ID_TEMPLATE % region_idx
 
     def line_id(self, region_idx=None, line_idx=None):
-        if not region_idx:
+        if region_idx is None:
             region_idx = self._counter['region']
-        if not line_idx:
+        if line_idx is None:
             line_idx = self._counter['line']
         return LINE_ID_TEMPLATE % (region_idx, line_idx)
 
diff --git a/qurator/eynollah/utils/xml.py b/qurator/eynollah/utils/xml.py
index b5c5ce3..e972218 100644
--- a/qurator/eynollah/utils/xml.py
+++ b/qurator/eynollah/utils/xml.py
@@ -41,7 +41,7 @@ def add_textequiv(parent, text=''):
     unireg = ET.SubElement(textequiv, 'Unicode')
     unireg.text = text
 
-def xml_reading_order(page, order_of_texts, id_of_texts, id_of_marginalia):
+def xml_reading_order(page, order_of_texts, id_of_marginalia):
     region_order = ET.SubElement(page, 'ReadingOrder')
     region_order_sub = ET.SubElement(region_order, 'OrderedGroup')
     region_order_sub.set('id', "ro357564684568544579089")
@@ -49,7 +49,7 @@ def xml_reading_order(page, order_of_texts, id_of_texts, id_of_marginalia):
     for idx_textregion, _ in enumerate(order_of_texts):
         name = ET.SubElement(region_order_sub, 'RegionRefIndexed')
         name.set('index', str(region_counter.get('region')))
-        name.set('regionRef', region_counter.region_id(order_of_texts[idx_textregion]))
+        name.set('regionRef', region_counter.region_id(order_of_texts[idx_textregion] + 1))
         region_counter.inc('region')
     for id_marginal in id_of_marginalia:
         name = ET.SubElement(region_order_sub, 'RegionRefIndexed')
diff --git a/qurator/eynollah/writer.py b/qurator/eynollah/writer.py
index 3bd68f2..d643941 100644
--- a/qurator/eynollah/writer.py
+++ b/qurator/eynollah/writer.py
@@ -142,7 +142,7 @@ class EynollahXmlWriter():
 
         id_of_marginalia = [counter_marginals.next_region_id for _ in found_polygons_marginals]
         if len(found_polygons_text_region) > 0:
-            xml_reading_order(page, order_of_texts, id_of_texts, id_of_marginalia)
+            xml_reading_order(page, order_of_texts, id_of_marginalia)
 
         for mm in range(len(found_polygons_text_region)):
             textregion = ET.SubElement(page, 'TextRegion')
@@ -188,7 +188,7 @@ class EynollahXmlWriter():
         counter_marginals = EynollahIdCounter(region_idx=len(order_of_texts))
 
         id_of_marginalia = [counter_marginals.next_region_id for _ in found_polygons_marginals]
-        xml_reading_order(page, order_of_texts, id_of_texts, id_of_marginalia)
+        xml_reading_order(page, order_of_texts, id_of_marginalia)
 
         for mm in range(len(found_polygons_text_region)):
             textregion=ET.SubElement(page, 'TextRegion')