1diff --git a/obabeliface/obabeliface.cpp b/obabeliface/obabeliface.cpp
2index 98a9020..a168803 100644
3--- a/obabeliface/obabeliface.cpp
4+++ b/obabeliface/obabeliface.cpp
5@@ -196,6 +196,7 @@ namespace Molsketch
6
7 // TODO should be const, but OpenBabel iterator methods do not support const
8 bool hasCoordinates(OpenBabel::OBMol &molecule) {
9+ using namespace OpenBabel;
10 FOR_ATOMS_OF_MOL(obatom, molecule) {
11 if (obatom->GetVector() != OpenBabel::VZero)
12 return true;