diff --git a/docs/Doxyfile.in b/docs/Doxyfile.in
index 25943f96..1022c8cc 100644
--- a/docs/Doxyfile.in
+++ b/docs/Doxyfile.in
@@ -869,7 +869,7 @@ FILTER_SOURCE_PATTERNS =
 # (index.html). This can be useful if you have a project on for instance GitHub
 # and want to reuse the introduction page also for the doxygen output.
 
-USE_MDFILE_AS_MAINPAGE = README.md
+USE_MDFILE_AS_MAINPAGE = @abs_top_srcdir@/README.md
 
 #---------------------------------------------------------------------------
 # Configuration options related to source browsing