diff --git a/opencv-4.1.2-cmake-includedir.patch b/opencv-4.1.2-cmake-includedir.patch
new file mode 100644
index 0000000..ade7358
--- /dev/null
+++ b/opencv-4.1.2-cmake-includedir.patch
@@ -0,0 +1,11 @@
+--- opencv-4.1.2/cmake/templates/OpenCVConfig.cmake.in.orig	2019-11-14 20:10:06.372000000 +0100
++++ opencv-4.1.2/cmake/templates/OpenCVConfig.cmake.in	2019-11-14 20:10:31.100000000 +0100
+@@ -77,7 +77,7 @@
+ # Extract the directory where *this* file has been installed (determined at cmake run-time)
+ # Get the absolute path with no ../.. relative marks, to eliminate implicit linker warnings
+ get_filename_component(OpenCV_CONFIG_PATH "${CMAKE_CURRENT_LIST_DIR}" REALPATH)
+-get_filename_component(OpenCV_INSTALL_PATH "${OpenCV_CONFIG_PATH}/@OpenCV_INSTALL_PATH_RELATIVE_CONFIGCMAKE@" REALPATH)
++get_filename_component(OpenCV_INSTALL_PATH "${OpenCV_CONFIG_PATH}/../../../" REALPATH)
+ 
+ # Search packages for host system instead of packages for target system.
+ # in case of cross compilation this macro should be defined by toolchain file
diff --git a/opencv.spec b/opencv.spec
index 3678f5d..9f6f85b 100644
--- a/opencv.spec
+++ b/opencv.spec
@@ -2,7 +2,7 @@
 %define javaver %(echo %version | cut -d. -f1-3 | tr -d .)
 Name:          opencv
 Version:       4.1.2
-Release:       2mamba
+Release:       3mamba
 Summary:       Collection of algorithms for computer vision
 Group:         Development/Libraries
 Vendor:        openmamba
@@ -15,6 +15,7 @@ Patch0:        %{name}-2.1.0-libpng14.patch
 Patch1:        %{name}-2.3.1-arm-build.patch
 Patch2:        opencv-2.4.9-buildfix-x86-asm-constraint.patch
 Patch3:        opencv-2.4.10-i586-inconsistent-constraint-asm.patch
+Patch4:        opencv-4.1.2-cmake-includedir.patch
 License:       BSD
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
@@ -107,6 +108,8 @@ Requires:      python-numpy-py36
 %description -n python-cv-py36
 This package contains Python bindings for the OpenCV library.
 
+%debug_package
+
 %prep
 %setup -q -c
 mv opencv-opencv-*/* .
@@ -115,6 +118,7 @@ mv opencv-opencv-*/* .
 %patch2 -p1
 %endif
 #%patch3 -p1
+%patch4 -p1
 
 %build
 #--   Interfaces:
@@ -137,6 +141,8 @@ mv opencv-opencv-*/* .
  -DCMAKE_CXX_FLAGS:STRING="$RPM_OPT_FLAGS -D__STDC_CONSTANT_MACROS" \
  -DPYTHON3_EXECUTABLE:PATH=%{__python36} \
  -DPYTHON3_PACKAGES_PATH:PATH=%{python36_sitelib} \
+ -DOPENCV_GENERATE_PKGCONFIG=ON \
+ -DOPENCV_ENABLE_NONFREE=ON \
  -DLIB_SUFFIX=
 
 %make_jobs
@@ -182,6 +188,7 @@ rm -fr %{buildroot}%{_datadir}/opencv/doc
 %{_libdir}/libopencv_*.so
 %dir %{_libdir}/cmake/opencv4
 %{_libdir}/cmake/opencv4/OpenCV*.cmake
+%{_libdir}/pkgconfig/opencv4.pc
 %dir %{_datadir}/licenses/opencv4
 %{_datadir}/licenses/opencv4/*
 
@@ -203,6 +210,9 @@ rm -fr %{buildroot}%{_datadir}/opencv/doc
 %endif
 
 %changelog
+* Thu Nov 14 2019 Silvan Calarco <silvan.calarco@mambasoft.it> 4.1.2-3mamba
+- fix cmake file for wrong include dir
+
 * Sat Nov 09 2019 Silvan Calarco <silvan.calarco@mambasoft.it> 4.1.2-2mamba
 - fix double provide/obsolete for opencv-python