diff --git a/unsupported/Eigen/src/SparseExtra/UmfPackSupport.h b/unsupported/Eigen/src/SparseExtra/UmfPackSupport.h
index 4be1aca62..c3e9c42ec 100644
--- a/unsupported/Eigen/src/SparseExtra/UmfPackSupport.h
+++ b/unsupported/Eigen/src/SparseExtra/UmfPackSupport.h
@@ -52,7 +52,7 @@ inline int umfpack_symbolic(int n_row,int n_col,
                             const int Ap[], const int Ai[], const std::complex<double> Ax[], void **Symbolic,
                             const double Control [UMFPACK_CONTROL], double Info [UMFPACK_INFO])
 {
-  return umfpack_zi_symbolic(n_row,n_col,Ap,Ai,&Ax[0].real(),0,Symbolic,Control,Info);
+  return umfpack_zi_symbolic(n_row,n_col,Ap,Ai,&(Ax[0].real()),0,Symbolic,Control,Info);
 }
 
 inline int umfpack_numeric( const int Ap[], const int Ai[], const double Ax[],