diff --git a/nettle.spec b/nettle.spec
index c69b1ee..ccf6186 100644
--- a/nettle.spec
+++ b/nettle.spec
@@ -1,3 +1,7 @@
+# Recent so-version, so we do not bump accidentally.
+%global nettle_so_ver 7
+%global hogweed_so_ver 5
+
 %bcond_without fips
 
 Name:           nettle
@@ -55,10 +59,10 @@ make %{?_smp_mflags}
 	%{?__debug_package:%{__debug_install_post}} \
 	%{__arch_install_post} \
 	%{__os_install_post} \
-	fipshmac -d $RPM_BUILD_ROOT%{_libdir} $RPM_BUILD_ROOT%{_libdir}/libnettle.so.7.* \
-	fipshmac -d $RPM_BUILD_ROOT%{_libdir} $RPM_BUILD_ROOT%{_libdir}/libhogweed.so.5.* \
-	file=`basename $RPM_BUILD_ROOT%{_libdir}/libnettle.so.7.*.hmac` && mv $RPM_BUILD_ROOT%{_libdir}/$file $RPM_BUILD_ROOT%{_libdir}/.$file && ln -s .$file $RPM_BUILD_ROOT%{_libdir}/.libnettle.so.7.hmac \
-	file=`basename $RPM_BUILD_ROOT%{_libdir}/libhogweed.so.5.*.hmac` && mv $RPM_BUILD_ROOT%{_libdir}/$file $RPM_BUILD_ROOT%{_libdir}/.$file && ln -s .$file $RPM_BUILD_ROOT%{_libdir}/.libhogweed.so.5.hmac \
+	fipshmac -d $RPM_BUILD_ROOT%{_libdir} $RPM_BUILD_ROOT%{_libdir}/libnettle.so.%{nettle_so_ver}.* \
+	fipshmac -d $RPM_BUILD_ROOT%{_libdir} $RPM_BUILD_ROOT%{_libdir}/libhogweed.so.%{hogweed_so_ver}.* \
+	file=`basename $RPM_BUILD_ROOT%{_libdir}/libnettle.so.%{nettle_so_ver}.*.hmac` && mv $RPM_BUILD_ROOT%{_libdir}/$file $RPM_BUILD_ROOT%{_libdir}/.$file && ln -s .$file $RPM_BUILD_ROOT%{_libdir}/.libnettle.so.%{nettle_so_ver}.hmac \
+	file=`basename $RPM_BUILD_ROOT%{_libdir}/libhogweed.so.%{hogweed_so_ver}.*.hmac` && mv $RPM_BUILD_ROOT%{_libdir}/$file $RPM_BUILD_ROOT%{_libdir}/.$file && ln -s .$file $RPM_BUILD_ROOT%{_libdir}/.libhogweed.so.%{hogweed_so_ver}.hmac \
 %{nil}
 %endif
 
@@ -75,8 +79,8 @@ rm -f $RPM_BUILD_ROOT%{_bindir}/sexp-conv
 rm -f $RPM_BUILD_ROOT%{_bindir}/nettle-hash
 rm -f $RPM_BUILD_ROOT%{_bindir}/nettle-pbkdf2
 
-chmod 0755 $RPM_BUILD_ROOT%{_libdir}/libnettle.so.7.*
-chmod 0755 $RPM_BUILD_ROOT%{_libdir}/libhogweed.so.5.*
+chmod 0755 $RPM_BUILD_ROOT%{_libdir}/libnettle.so.%{nettle_so_ver}.*
+chmod 0755 $RPM_BUILD_ROOT%{_libdir}/libhogweed.so.%{hogweed_so_ver}.*
 
 %check
 make check
@@ -85,10 +89,10 @@ make check
 %doc AUTHORS NEWS README
 %license COPYINGv2 COPYING.LESSERv3
 %{_infodir}/nettle.info.*
-%{_libdir}/libnettle.so.7
-%{_libdir}/libnettle.so.7.*
-%{_libdir}/libhogweed.so.5
-%{_libdir}/libhogweed.so.5.*
+%{_libdir}/libnettle.so.%{nettle_so_ver}
+%{_libdir}/libnettle.so.%{nettle_so_ver}.*
+%{_libdir}/libhogweed.so.%{hogweed_so_ver}
+%{_libdir}/libhogweed.so.%{hogweed_so_ver}.*
 %if %{with fips}
 %{_libdir}/.libhogweed.so.*.hmac
 %{_libdir}/.libnettle.so.*.hmac