diff --git a/nlpsolver/src/com/sun/star/comp/Calc/NLPSolver/BaseNLPSolver.java b/nlpsolver/src/com/sun/star/comp/Calc/NLPSolver/BaseNLPSolver.java
index e1386a6e52c3..acfd569ba441 100644
--- a/nlpsolver/src/com/sun/star/comp/Calc/NLPSolver/BaseNLPSolver.java
+++ b/nlpsolver/src/com/sun/star/comp/Calc/NLPSolver/BaseNLPSolver.java
@@ -163,7 +163,7 @@ public abstract class BaseNLPSolver extends WeakBase
         return m_variables;
     }
 
-    private class RowInfo {
+    private static class RowInfo {
         private short Sheet;
         private int Row;
         private int StartCol;