- Added Doxygen source code documentation parts (donated by Fox-IT)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index bb858e8..ed01dae 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -19,5 +19,5 @@
 add_subdirectory(programs)
 
 ADD_CUSTOM_TARGET(apidoc
-                  COMMAND doxygen Doxyfile
+                  COMMAND doxygen doxygen/polarssl.doxyfile
                   WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})