diff --git a/wdune.spec b/wdune.spec
index 7e51884..58424b9 100644
--- a/wdune.spec
+++ b/wdune.spec
@@ -96,7 +96,8 @@ Documentation for white_dune
     --with-x11-editor="gedit" \
     --with-imageeditor="kolourpaint" \
     --with-imageeditor4kids="kolourpaint" \
-    --with-soundeditor=audacity
+    --with-soundeditor=audacity \
+    --with-allow-multiple-definition
 %make_build 
 pushd docs/export_example_c++/opengl_example
 make render_with_picture_path