kc3-lang/kc3

diff --git a/libc3/env.c b/libc3/env.c
index 0093b97..ce07565 100644
--- a/libc3/env.c
+++ b/libc3/env.c
@@ -102,6 +102,7 @@ s_tag * env_def (s_env *env, const s_call *call, s_tag *dest)
                            &tag_value))
     return NULL;
   tag_init_ident(dest, &tag_ident.data.ident);
+  tag_clean(&tag_value);
   return dest;
 }