diff --git a/plug-ins/common/file-compressor.c b/plug-ins/common/file-compressor.c
index 5e72d29867..b8b48cfee0 100644
--- a/plug-ins/common/file-compressor.c
+++ b/plug-ins/common/file-compressor.c
@@ -213,7 +213,7 @@ static const Compressor compressors[] =
     N_("xz archive"),
     "application/x-xz",
     "xcf.xz,xcfxz", /* FIXME "xcf.xz,xz,xcfxz" */
-    "0,ustring,\3757zXZ\x00",
+    "0,string,\3757zXZ\x00",
     ".xcfxz",
     ".xz",