diff --git a/doc/Doxyfile.cmake b/doc/Doxyfile.cmake
index 2c37afe..55195e1 100644
--- a/doc/Doxyfile.cmake
+++ b/doc/Doxyfile.cmake
@@ -641,7 +641,7 @@ WARN_LOGFILE           =
 # directories like "/usr/src/myproject". Separate the files or directories 
 # with spaces.
 
-INPUT                  = @CMAKE_CURRENT_SOURCE_DIR@/../doc/mainpage.c \
+INPUT                  = @CMAKE_CURRENT_SOURCE_DIR@/../doc/mainpage.dox \
                          @CMAKE_CURRENT_SOURCE_DIR@/../src
 
 # This tag can be used to specify the character encoding of the source files 
diff --git a/doc/mainpage.c b/doc/mainpage.dox
similarity index 100%
rename from doc/mainpage.c
rename to doc/mainpage.dox