diff --git a/eigen3-3.3.5-disable-DGMRES.patch b/eigen3-3.3.5-disable-DGMRES.patch
new file mode 100644
index 0000000..a4be925
--- /dev/null
+++ b/eigen3-3.3.5-disable-DGMRES.patch
@@ -0,0 +1,12 @@
+diff -Nru eigen3-3.3.5.orig/eigen/unsupported/Eigen/IterativeSolvers eigen3-3.3.5/eigen/unsupported/Eigen/IterativeSolvers
+--- eigen3-3.3.5.orig/eigen/unsupported/Eigen/IterativeSolvers	2018-07-23 11:33:42.000000000 +0200
++++ eigen3-3.3.5/eigen/unsupported/Eigen/IterativeSolvers	2018-08-22 20:35:02.966001027 +0200
+@@ -33,7 +33,7 @@
+ #include "../../Eigen/Jacobi"
+ #include "../../Eigen/Householder"
+ #include "src/IterativeSolvers/GMRES.h"
+-#include "src/IterativeSolvers/DGMRES.h"
++//#include "src/IterativeSolvers/DGMRES.h"
+ //#include "src/IterativeSolvers/SSORPreconditioner.h"
+ #include "src/IterativeSolvers/MINRES.h"
+ 
diff --git a/eigen3.spec b/eigen3.spec
index 2b6b608..a4725b3 100644
--- a/eigen3.spec
+++ b/eigen3.spec
@@ -1,6 +1,6 @@
 Name:          eigen3
 Version:       3.3.5
-Release:       1mamba
+Release:       2mamba
 Summary:       A C++ template library for linear algebra
 Group:         System/Libraries
 Vendor:        openmamba
@@ -9,6 +9,7 @@ Packager:      Davide Madrisan <davide.madrisan@gmail.com>
 URL:           http://eigen.tuxfamily.org
 Source:        http://bitbucket.org/eigen/eigen/get/%{version}.tar.bz2
 Patch0:        eigen3-3.2.10-fix-pkgconfig-includedir.patch
+Patch1:        eigen3-3.3.5-disable-DGMRES.patch
 License:       LGPL, MPL
 ## AUTOBUILDREQ-BEGIN
 ## AUTOBUILDREQ-END
@@ -33,6 +34,7 @@ This package contains static libraries and header files need for development.
 %setup -q -c
 mv eigen-* eigen
 %patch0 -p1
+%patch1 -p1
 
 %build
 cd eigen
@@ -61,6 +63,9 @@ cd eigen
 %doc eigen/COPYING.*
 
 %changelog
+* Wed Aug 22 2018 Silvan Calarco <silvan.calarco@mambasoft.it> 3.3.5-2mamba
+- disable including unsupported DGMRES.h header causing kde step build fail
+
 * Tue Jul 24 2018 Automatic Build System <autodist@mambasoft.it> 3.3.5-1mamba
 - automatic version update by autodist