diff --git a/poet/include/IPhreeqcPOET.hpp b/poet/include/IPhreeqcPOET.hpp
index 91365304..f495b506 100644
--- a/poet/include/IPhreeqcPOET.hpp
+++ b/poet/include/IPhreeqcPOET.hpp
@@ -63,6 +63,8 @@ public:
       getCell(i, cell_values);
       values.push_back(cell_values);
     }
+
+    this->queued_cell_pointer = 1;
   }
 
   void runQueuedCells(double time_step) {