add 'const'

diff --git a/src/lib/unlang/foreach_priv.h b/src/lib/unlang/foreach_priv.h
index 798477e2c5bdb63d1bf611faed5402c3277988f3..43df37dca8b56172744a642d7c1083482fff513d 100644 (file)
--- a/src/lib/unlang/foreach_priv.h
+++ b/src/lib/unlang/foreach_priv.h
@@ -32,7 +32,7 @@ extern "C" {
 typedef struct {
        unlang_group_t  group;
        tmpl_t          *vpt;
-       fr_dict_attr_t  *key;           //!< key variable for the foreach loop
+       fr_dict_attr_t const   *key;            //!< key variable for the foreach loop
 } unlang_foreach_t;
 
 /** Cast a group structure to the foreach keyword extension