diff --git a/Appl/CEP/CS1/CS1_IONProc/src/WH_InputSection.cc b/Appl/CEP/CS1/CS1_IONProc/src/WH_InputSection.cc
index 55c4c0e90dcf9266354eb5a46e832bf8aabec9b2..6abf5aee391165651d9f32f0f3b249a9815aa80a 100644
--- a/Appl/CEP/CS1/CS1_IONProc/src/WH_InputSection.cc
+++ b/Appl/CEP/CS1/CS1_IONProc/src/WH_InputSection.cc
@@ -150,7 +150,7 @@ void WH_InputSection::limitFlagsLength(SparseSet<unsigned> &flags)
   const SparseSet<unsigned>::Ranges &ranges = flags.getRanges();
 
   if (ranges.size() > 16)
-    flags.include(ranges[15].begin, ranges[ranges.size() - 1].end);
+    flags.include(ranges[15].begin, ranges.back().end);
 }