diff --git a/geis.spec b/geis.spec
index 0d4422a..2fba4f0 100644
--- a/geis.spec
+++ b/geis.spec
@@ -31,6 +31,7 @@ Source2:        %{name}.keyring
 Source3:        baselibs.conf
 # PATCH-FIX-OPENSUSE geis-disable-werror.patch boo#985131 sor.alexei@meowr.ru -- Disable -Werror.
 Patch0:         %{name}-disable-werror.patch
+BuildRequires:  autoconf
 BuildRequires:  automake
 BuildRequires:  fdupes
 BuildRequires:  libtool