diff --git a/mingw-lcms2.spec b/mingw-lcms2.spec
index 388dcff..a6a74d2 100644
--- a/mingw-lcms2.spec
+++ b/mingw-lcms2.spec
@@ -68,7 +68,7 @@ mingw64-%{mingw_pkg_name} development.
 %{?mingw_debug_package}
 
 %prep
-%setup -q -n %{mingw_pkg_name}-%{version}
+%setup -q -n %{mingw_pkg_name}-%{version}%{prerelease}
 iconv -f ISO-8859-1 -t UTF-8 AUTHORS > AUTHORS.x
 mv -f AUTHORS.x AUTHORS