diff --git a/library/data/bitvec.lean b/library/data/bitvec.lean
index f73156faa9..cbbd884d13 100644
--- a/library/data/bitvec.lean
+++ b/library/data/bitvec.lean
@@ -145,13 +145,6 @@ section comparison
 
 end comparison
 
-/-
--- Create bitvecor from nat
-def from_nat {n} : ℕ → bitvec n
-| 0 := 0
-| (nat.succ x) := from_nat x + 1
--/
-
 section conversion
   variable {α : Type}