diff --git a/core/lib/Math/Vector/Vector.hpp b/core/lib/Math/Vector/Vector.hpp
index ea90aff84..a0977d5f2 100644
--- a/core/lib/Math/Vector/Vector.hpp
+++ b/core/lib/Math/Vector/Vector.hpp
@@ -287,7 +287,7 @@ namespace gpstk
       {
          std::vector<T> v;
          for(size_t i = 0; i < s; i++)
-            v.push_back(v[i] );
+            v.push_back(this->v[i] );
          return v;
       }