diff --git a/subversion.spec b/subversion.spec
index 03e9ac7..4a2d704 100644
--- a/subversion.spec
+++ b/subversion.spec
@@ -387,6 +387,7 @@ CXXFLAGS="%{optflags}" \
 	    --without-allegrocl \
 	    --without-clisp \
 	    --without-r \
+            %{?_with_subversion_libserf_support} \
 	    --with-swiglibdir="$SWIG_ROOT/share/swig"
 %__make %{?jobs:-j%{jobs}}
 %__make install