| diff --git a/tests/cxx/tree/prefix/makefile b/tests/cxx/tree/prefix/makefile |
| index 3317161..77b4b0a 100644 |
| --- a/tests/cxx/tree/prefix/makefile |
| +++ b/tests/cxx/tree/prefix/makefile |
| @@ -35,7 +35,7 @@ gen := $(addprefix $(out_base)/,$(genf)) |
| |
| $(gen): xsd := $(out_root)/xsd/xsd |
| $(gen): xsd_options := --generate-serialization --generate-polymorphic \ |
| ---polymorphic-type foo\\\#base --root-element root |
| +--polymorphic-type foo\\\\\#base --root-element root |
| $(gen): $(out_root)/xsd/xsd |
| |
| $(call include-dep,$(dep)) |
