Index: libcfa/Makefile.in
===================================================================
--- libcfa/Makefile.in	(revision 2c2242c773dd4781ea54f277dace24b26fca305e)
+++ libcfa/Makefile.in	(revision 26a07a225bf00a2b82a72b9675c55a8d255daa71)
@@ -18,5 +18,5 @@
 
 libcfa-prelude.c: ../translator/cfa-cpp prelude.cf builtins.cf
-	sed -i -e "s#typedef.*ptrdiff_t.*#`@BACKEND_CC@ -E ptrdiff_t.c | grep 'typedef.*ptrdiff_t'`#" prelude.cf
+	sed -i sed -e "s#typedef.*ptrdiff_t.*#`@BACKEND_CC@ -E ptrdiff_t.c | grep 'typedef.*ptrdiff_t'`#" prelude.cf
 	../translator/cfa-cpp -l prelude.cf $@
 	rm -f prelude.c