diff --git a/systemtap-docs.changes b/systemtap-docs.changes
index 2b7424f..8def6b9 100644
--- a/systemtap-docs.changes
+++ b/systemtap-docs.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Wed Dec 21 10:44:28 UTC 2011 - coolo@suse.com
+
+- add autoconf as buildrequire to avoid implicit dependency
+
 -------------------------------------------------------------------
 Wed Nov  2 10:54:46 CET 2011 - jslaby@suse.de
 
diff --git a/systemtap-docs.spec b/systemtap-docs.spec
index 90435fa..dabffb0 100644
--- a/systemtap-docs.spec
+++ b/systemtap-docs.spec
@@ -19,7 +19,7 @@
 
 
 Name:           systemtap-docs
-BuildRequires:  gcc-c++ libebl-devel pkg-config
+BuildRequires:  gcc-c++ libebl-devel pkg-config autoconf
 # for documents
 BuildRequires:  xmlto
 BuildRequires:  fop