diff --git a/os/pl-error.c b/os/pl-error.c
index 299b3f9fc..43ede40b2 100644
--- a/os/pl-error.c
+++ b/os/pl-error.c
@@ -30,7 +30,7 @@ PL_get_chars_ex(term_t t, char **s, unsigned int flags)
 }
 
 
-//#undef PL_get_atom_ex
+#undef PL_get_atom_ex
 
 int
 PL_get_atom_ex__LD(term_t t, atom_t *a ARG_LD)
@@ -39,7 +39,7 @@ PL_get_atom_ex__LD(term_t t, atom_t *a ARG_LD)
 
   return PL_error(NULL, 0, NULL, ERR_TYPE, ATOM_atom, t);
 }
-/*
+
 int
 PL_get_atom_ex(term_t t, atom_t *a)
 { if ( PL_get_atom(t, a) )
@@ -47,7 +47,7 @@ PL_get_atom_ex(term_t t, atom_t *a)
 
   return PL_error(NULL, 0, NULL, ERR_TYPE, ATOM_atom, t);
 }
-*/
+
 
 int
 PL_get_integer_ex(term_t t, int *i)