diff --git a/include/boost/compute/exception/context_error.hpp b/include/boost/compute/exception/context_error.hpp
index eeb387d8..ec8dc7c3 100644
--- a/include/boost/compute/exception/context_error.hpp
+++ b/include/boost/compute/exception/context_error.hpp
@@ -70,7 +70,7 @@ public:
     }
 
     /// Returns the size of the private info memory block.
-    const size_t get_private_info_size() const throw()
+    size_t get_private_info_size() const throw()
     {
         return m_private_info_size;
     }
diff --git a/include/boost/compute/interop/opengl/acquire.hpp b/include/boost/compute/interop/opengl/acquire.hpp
index 10af4338..b9259e0d 100644
--- a/include/boost/compute/interop/opengl/acquire.hpp
+++ b/include/boost/compute/interop/opengl/acquire.hpp
@@ -14,6 +14,7 @@
 #include <boost/compute/command_queue.hpp>
 #include <boost/compute/interop/opengl/cl_gl.hpp>
 #include <boost/compute/interop/opengl/opengl_buffer.hpp>
+#include <boost/compute/types/fundamental.hpp>
 #include <boost/compute/utility/wait_list.hpp>
 
 namespace boost {
@@ -22,7 +23,7 @@ namespace compute {
 /// Enqueues a command to acquire the specified OpenGL memory objects.
 ///
 /// \see_opencl_ref{clEnqueueAcquireGLObjects}
-inline event opengl_enqueue_acquire_gl_objects(size_t num_objects,
+inline event opengl_enqueue_acquire_gl_objects(const uint_ num_objects,
                                               const cl_mem *mem_objects,
                                               command_queue &queue,
                                               const wait_list &events = wait_list())
@@ -47,7 +48,7 @@ inline event opengl_enqueue_acquire_gl_objects(size_t num_objects,
 /// Enqueues a command to release the specified OpenGL memory objects.
 ///
 /// \see_opencl_ref{clEnqueueReleaseGLObjects}
-inline event opengl_enqueue_release_gl_objects(size_t num_objects,
+inline event opengl_enqueue_release_gl_objects(const uint_ num_objects,
                                               const cl_mem *mem_objects,
                                               command_queue &queue,
                                               const wait_list &events = wait_list())
diff --git a/include/boost/compute/kernel.hpp b/include/boost/compute/kernel.hpp
index 27244c2e..caa1e79b 100644
--- a/include/boost/compute/kernel.hpp
+++ b/include/boost/compute/kernel.hpp
@@ -188,7 +188,9 @@ public:
     template<class T>
     T get_arg_info(size_t index, cl_kernel_arg_info info) const
     {
-        return detail::get_object_info<T>(clGetKernelArgInfo, m_kernel, info, index);
+        return detail::get_object_info<T>(
+            clGetKernelArgInfo, m_kernel, info, static_cast<cl_uint>(index)
+        );
     }
 
     /// \overload
@@ -270,6 +272,8 @@ public:
             BOOST_THROW_EXCEPTION(opencl_error(ret));
         }
         #else
+        (void) index;
+        (void) ptr;
         BOOST_THROW_EXCEPTION(opencl_error(CL_INVALID_ARG_VALUE));
         #endif
     }