diff --git a/opencv.spec b/opencv.spec
index 9f6f85b..2329e98 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:       3mamba
+Release:       4mamba
 Summary:       Collection of algorithms for computer vision
 Group:         Development/Libraries
 Vendor:        openmamba
@@ -143,6 +143,7 @@ mv opencv-opencv-*/* .
  -DPYTHON3_PACKAGES_PATH:PATH=%{python36_sitelib} \
  -DOPENCV_GENERATE_PKGCONFIG=ON \
  -DOPENCV_ENABLE_NONFREE=ON \
+ -DENABLE_PRECOMPILED_HEADERS=OFF \
  -DLIB_SUFFIX=
 
 %make_jobs
@@ -210,6 +211,9 @@ rm -fr %{buildroot}%{_datadir}/opencv/doc
 %endif
 
 %changelog
+* Sun Dec 08 2019 Silvan Calarco <silvan.calarco@mambasoft.it> 4.1.2-4mamba
+- rebuilt with -DENABLE_PRECOMPILED_HEADERS=OFF to fix blender build, see https://stackoverflow.com/questions/43558709/opencv-and-tbb-error-x64?rq=1
+
 * Thu Nov 14 2019 Silvan Calarco <silvan.calarco@mambasoft.it> 4.1.2-3mamba
 - fix cmake file for wrong include dir