diff --git a/doc/CMakeLists.txt b/doc/CMakeLists.txt
index 71691927..d30e384e 100644
--- a/doc/CMakeLists.txt
+++ b/doc/CMakeLists.txt
@@ -9,7 +9,7 @@ IF(DOXYGEN_FOUND)
   # Configure the doxygen config file with variable from CMake and move it
   CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.dox.cmake.in
     ${CMAKE_BINARY_DIR}/doc/Doxyfile-html.dox @ONLY)
-  
+
   # Configure the html mainpage file of the doxygen documentation with variable
   # from CMake and move it  
   CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/mainpage.dox.cmake