diff --git a/src/plugins/variadic/tests/erroneous/oracle/variadic-builtin.res.oracle b/src/plugins/variadic/tests/erroneous/oracle/variadic-builtin.res.oracle
index 348e8c477dabbdd59001acfa7a657eb14cb7aa1b..a5caa303321a2c8a59eeca0aa1e0fd1d70baad98 100644
--- a/src/plugins/variadic/tests/erroneous/oracle/variadic-builtin.res.oracle
+++ b/src/plugins/variadic/tests/erroneous/oracle/variadic-builtin.res.oracle
@@ -1,3 +1,5 @@
+[variadic] tests/erroneous/variadic-builtin.i:1: 
+  Declaration of variadic function Frama_C_show_each_warning.
 [variadic] tests/erroneous/variadic-builtin.i:1: 
   Variadic builtin Frama_C_show_each_warning left untransformed.
 [kernel] tests/erroneous/variadic-builtin.i:6: Plug-in variadic aborted: unimplemented feature.
diff --git a/src/plugins/variadic/tests/known/oracle/printf_garbled_mix.res.oracle b/src/plugins/variadic/tests/known/oracle/printf_garbled_mix.res.oracle
index 3cecd8f9b1e42365b8af2c9e3217c941bd59aea4..3ba86d9da3ae971fb31c76d3bfd3a967be0ddb5c 100644
--- a/src/plugins/variadic/tests/known/oracle/printf_garbled_mix.res.oracle
+++ b/src/plugins/variadic/tests/known/oracle/printf_garbled_mix.res.oracle
@@ -14,8 +14,6 @@
   Declaration of variadic function sscanf.
 [variadic] FRAMAC_SHARE/libc/stdio.h:541: 
   Declaration of variadic function dprintf.
-[variadic] tests/known/printf_garbled_mix.c:8: 
-  Variadic builtin Frama_C_show_each_nb_printed left untransformed.
 [variadic] tests/known/printf_garbled_mix.c:7: 
   Translating call to printf to a call to the specialized version printf_va_1.
 [eva] Analyzing a complete application starting at main
diff --git a/src/plugins/variadic/translate.ml b/src/plugins/variadic/translate.ml
index 46f76bbce8ef2dcfe72df9f3cce29d8fce2d54a5..b2bbd04dbb1302f8de40b034909dbbebf1b1b46f 100644
--- a/src/plugins/variadic/translate.ml
+++ b/src/plugins/variadic/translate.ml
@@ -89,8 +89,10 @@ let translate_variadics (file : file) =
     method! vglob glob =
       begin match glob with
         | GFunDecl(_, vi, _) when is_framac_builtin vi ->
-          Self.result ~level:2 ~current:true
-            "Variadic builtin %s left untransformed." vi.vname;
+          if Classify.classify env vi <> None then begin
+            Self.result ~level:2 ~current:true
+              "Variadic builtin %s left untransformed." vi.vname;
+          end;
           Cil.SkipChildren
 
         | GFunDecl(_, vi, _) ->