diff --git a/egon_no.py b/egon_no.py
index 30c5660..3bbc6ec 100755
--- a/egon_no.py
+++ b/egon_no.py
@@ -1033,7 +1033,7 @@ class ReadingModel():
             p.strip()		
             nextArray.append(p.split("-"))
         for n in nextArray:
-            sum += int(n[1]) - int(n[0])
+            sum += int(n[1]) - int(n[0]) + 1
         return sum
 
     ## Return whether the reading has been done or not