diff --git a/libtommath.spec b/libtommath.spec
index 314e7c1..d6cc8eb 100644
--- a/libtommath.spec
+++ b/libtommath.spec
@@ -1,6 +1,6 @@
 Name:           libtommath
 Version:        1.0.1
-Release:        8%{?dist}
+Release:        9%{?dist}
 Summary:        A portable number theoretic multiple-precision integer library
 License:        Public Domain
 URL:            http://www.libtom.net/
@@ -56,7 +56,7 @@ sed -i \
 %build
 %set_build_flags
 %make_build V=1 CFLAGS="$CFLAGS -I./" -f makefile.shared
-%make_build V=1 -f makefile poster manual docs
+make V=1 -f makefile poster manual docs
 
 %install
 %make_install V=1 CFLAGS="$CFLAGS -I./" PREFIX=%{_prefix} LIBPATH=%{_libdir} -f makefile.shared
@@ -79,6 +79,9 @@ find %{buildroot} -name '*.a' -delete
 %doc doc/bn.pdf doc/poster.pdf doc/tommath.pdf
 
 %changelog
+* Sun Jun 02 2019 Leigh Scott <leigh123linux@googlemail.com> - 1.0.1-9
+- Disable parallel build for docs
+
 * Tue May 14 2019 Scott Talbert <swt@techie.net> - 1.0.1-8
 - Add BR texlive-updmap-map to fix FTBFS when building docs (#1675313)