--- ocltoys/mandelgpu/mandelgpu.cpp.orig	2017-09-28 21:40:56.883307931 +0000
+++ ocltoys/mandelgpu/mandelgpu.cpp	2017-09-28 21:42:19.596640278 +0000
@@ -45,7 +45,7 @@
 		boost::program_options::options_description opts("MandelGPU options");
 
 		opts.add_options()
-			("kernel,k", boost::program_options::value<std::string>()->default_value("rendering_kernel_float4.cl"),
+			("kernel,k", boost::program_options::value<std::string>()->default_value("/usr/local/share/ocltoys/mandelgpu/rendering_kernel_float4.cl"),
 				"OpenCL kernel file name")
 			("iterations,i", boost::program_options::value<unsigned int>()->default_value(256u),
 				"Number of iterations")