diff --git a/src/main/java/org/apache/commons/math3/linear/ConjugateGradient.java b/src/main/java/org/apache/commons/math3/linear/ConjugateGradient.java
index a7b80a43f..17bbacfd4 100644
--- a/src/main/java/org/apache/commons/math3/linear/ConjugateGradient.java
+++ b/src/main/java/org/apache/commons/math3/linear/ConjugateGradient.java
@@ -151,7 +151,7 @@ public class ConjugateGradient
                                    final RealVector x0)
         throws NullArgumentException, NonPositiveDefiniteOperatorException,
         NonSquareOperatorException, DimensionMismatchException,
-        MaxCountExceededException, NonPositiveDefiniteOperatorException {
+        MaxCountExceededException {
         checkParameters(a, m, b, x0);
         final IterationManager manager = getIterationManager();
         // Initialization of default stopping criterion