diff --git a/src/java/org/apache/commons/math/optimization/general/AbstractLeastSquaresOptimizer.java b/src/java/org/apache/commons/math/optimization/general/AbstractLeastSquaresOptimizer.java
index 8f096ac68..70af06dbc 100644
--- a/src/java/org/apache/commons/math/optimization/general/AbstractLeastSquaresOptimizer.java
+++ b/src/java/org/apache/commons/math/optimization/general/AbstractLeastSquaresOptimizer.java
@@ -183,6 +183,7 @@ public abstract class AbstractLeastSquaresOptimizer implements VectorialDifferen
     protected void updateResidualsAndCost()
         throws ObjectiveException {
 
+        ++objectiveEvaluations;
         objective = f.objective(variables);
         if (objective.length != rows) {
             throw new ObjectiveException("dimension mismatch {0} != {1}",