diff --git a/doc/Jamfile.v2 b/doc/Jamfile.v2
index 303e2b7..2e28c5b 100644
--- a/doc/Jamfile.v2
+++ b/doc/Jamfile.v2
@@ -48,7 +48,4 @@ boostbook doc : qbk
     ;
 
 install pdf-install : doc : <location>. <install-type>PDF <name>local_function.pdf ;
-
-
-
-
+explicit pdf-install ;