diff --git a/Eigen/src/PardisoSupport/PardisoSupport.h b/Eigen/src/PardisoSupport/PardisoSupport.h
index cb22e992a..69f4a18bb 100644
--- a/Eigen/src/PardisoSupport/PardisoSupport.h
+++ b/Eigen/src/PardisoSupport/PardisoSupport.h
@@ -142,7 +142,7 @@ class PardisoImpl
       * See the PARDISO manual to know how to use it. */
     Array<Index,64,1>& pardisoParameterArray()
     {
-      return m_param;
+      return m_iparm;
     }
     
     /** Performs a symbolic decomposition on the sparcity of \a matrix.