diff --git a/docs/Makefile.am b/docs/Makefile.am
index c01e085d10d00546ca90e9181963ba2606ce16c4..1183321413890b92d9d20b480f49ff9b8639ac29 100644
--- a/docs/Makefile.am
+++ b/docs/Makefile.am
@@ -53,7 +53,7 @@ gif = \
   architecture.gif \
   node.gif
 
-dot_html_in = $(wildcard *.html.in)
+dot_html_in = $(notdir $(wildcard $(srcdir)/*.html.in))
 dot_html = $(dot_html_in:%.html.in=%.html)
 
 patches = $(wildcard api_extension/*.patch)