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-rw-r--r--plugins/firstorder/formula.ml2
1 files changed, 1 insertions, 1 deletions
diff --git a/plugins/firstorder/formula.ml b/plugins/firstorder/formula.ml
index d224f87df..093087511 100644
--- a/plugins/firstorder/formula.ml
+++ b/plugins/firstorder/formula.ml
@@ -116,7 +116,7 @@ type side = Hyp | Concl | Hint
let no_atoms = (false,{positive=[];negative=[]})
-let dummy_id=VarRef (id_of_string "_") (* "_" cannot be parsed *)
+let dummy_id=VarRef (Id.of_string "_") (* "_" cannot be parsed *)
let build_atoms gl metagen side cciterm =
let trivial =ref false