1 files changed, 1 insertions, 1 deletions
diff --git a/subst.c b/subst.c
index f2987a51..d9feabca 100644
--- a/subst.c
+++ b/subst.c
@@ -8660,7 +8660,7 @@ parameter_brace_transform (varname, value, estatep, xform, rtype, quoted, pflags
       return ((char *)NULL);
     }
 
-  if (valid_parameter_transform (xform) == 0)
+  if (xform[0] == 0 || valid_parameter_transform (xform) == 0)
     {
       this_command_name = oname;
       if (vtype == VT_VARIABLE)