diff --git a/cmake/FindSphinx.cmake b/cmake/FindSphinx.cmake
index 1c29cb22a31f1e41a6b5575837c6374175cfdea5..f74cd4ff8c9c2c52319b18ac37264167b3718eae 100644
--- a/cmake/FindSphinx.cmake
+++ b/cmake/FindSphinx.cmake
@@ -72,7 +72,7 @@ function( Sphinx_add_target target_name builder conf cache source destination )
     ${source}
     ${destination}
     COMMENT "Generating sphinx documentation: ${builder}"
-    COMMAND cd ${destination} && ln -s ./index_*.html index.html
+    COMMAND cd ${destination} && ln -sf ./index_*.html index.html
     )
 
   set_property(