diff --git a/opencv.spec b/opencv.spec
index 35db91a..fe3381d 100644
--- a/opencv.spec
+++ b/opencv.spec
@@ -2,7 +2,7 @@
 %define javaver %(echo %version | cut -d. -f1-3 | tr -d .)
 Name:          opencv
 Version:       2.4.11
-Release:       1mamba
+Release:       2mamba
 Summary:       Collection of algorithms for computer vision
 Group:         Development/Libraries
 Vendor:        openmamba
@@ -73,6 +73,7 @@ This package contains the OpenCV static libraries.
 Summary:       Devel package for %{name}
 Group:         Development/Libraries
 Requires:      lib%{name} = %{?epoch:%epoch:}%{version}-%{release}
+Requires:      java-opencv = %{?epoch:%epoch:}%{version}-%{release}
 
 %description -n lib%{name}-devel
 OpenCV (Open Source Computer Vision) is a library of programming functions for real time computer vision. 
@@ -90,6 +91,7 @@ This package contains the OpenCV libraries built with gstreamer 0.10 for KDE 4
 Summary:       Devel package for %{name}
 Group:         Development/Libraries
 Requires:      lib%{name}-kde4 = %{?epoch:%epoch:}%{version}-%{release}
+Requires:      java-opencv = %{?epoch:%epoch:}%{version}-%{release}
 
 %description -n lib%{name}-kde4-devel
 OpenCV (Open Source Computer Vision) is a library of programming functions for real time computer vision. 
@@ -307,6 +309,9 @@ rm -rf %{buildroot}/opt/kde/lib/python*
 %{_kde4_libdir}/pkgconfig/opencv.pc
 
 %changelog
+* Tue Sep 22 2015 Silvan Calarco <silvan.calarco@mambasoft.it> 2.4.11-2mamba
+- libopencv-devel: require java-opencv or provided cmake files fail
+
 * Fri Aug 14 2015 Silvan Calarco <silvan.calarco@mambasoft.it> 2.4.11-1mamba
 - update to 2.4.11