diff --git a/concordia/occurences_list.hpp b/concordia/occurences_list.hpp
index 8ca7267..7380eea 100644
--- a/concordia/occurences_list.hpp
+++ b/concordia/occurences_list.hpp
@@ -31,7 +31,7 @@ public:
         return _occurences;
     }
 
-    SUFFIX_MARKER_TYPE getTotalCount() {
+    SUFFIX_MARKER_TYPE getTotalCount() const {
         return _totalCount;
     }