diff --git a/libkcapi.spec b/libkcapi.spec
index c916a39..ff72b70 100644
--- a/libkcapi.spec
+++ b/libkcapi.spec
@@ -27,6 +27,7 @@ Url:            http://www.chronox.de/libkcapi.html
 Source:         libkcapi-0.13.0.tar.bz2
 # this ensures this kernel is booted actually... as the kernel crypto api is used during.
 BuildRequires:  kernel-default
+BuildRequires:  docbook-utils
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 
 %description