diff --git a/groff.spec b/groff.spec
index 3df1444..df943c7 100644
--- a/groff.spec
+++ b/groff.spec
@@ -11,7 +11,7 @@ Source: http://ftp.gnu.org/gnu/groff/groff-%{version}.tar.gz
 BuildRequires: gcc, gcc-c++ texinfo
 BuildRequires: git, netpbm-progs, perl-generators, psutils, ghostscript
 BuildRequires: libXaw-devel, libXmu-devel
-BuildRequires: jbig2dec-libs 
+BuildRequires: jbig2dec-libs m4
 Requires:      coreutils
 Requires:     %{name}-base = %{version}-%{release}