diff --git a/gnucash-docs.spec b/gnucash-docs.spec
index f2234cc..43010d9 100644
--- a/gnucash-docs.spec
+++ b/gnucash-docs.spec
@@ -27,6 +27,7 @@ Source:         https://sourceforge.net/projects/gnucash/files/gnucash%20(stable
 BuildRequires:  fdupes
 BuildRequires:  sgml-skel
 BuildRequires:  xsltproc
+BuildRequires:  cmake
 BuildArch:      noarch
 Recommends:     %{_bindir}/gnome-help