--- branches/development/src/nonbonded/LJ.cpp	2011/04/30 02:54:02	1554
+++ branches/development/src/nonbonded/LJ.cpp	2011/05/27 16:45:44	1571
@@ -245,7 +245,7 @@ namespace OpenMD {
     if (!initialized_) initialize();
     
     map<pair<AtomType*, AtomType*>, LJInteractionData>::iterator it;
-    it = MixingMap.find( *(idat.atypes) );
+    it = MixingMap.find( idat.atypes );
     
     if (it != MixingMap.end())  {