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-rw-r--r--src/Util/NUtil.v2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/Util/NUtil.v b/src/Util/NUtil.v
index 6f50642c3..1faa1da95 100644
--- a/src/Util/NUtil.v
+++ b/src/Util/NUtil.v
@@ -126,7 +126,7 @@ Module N.
(0 <= z2 < 2 ^ (Z.of_nat sz2))%Z ->
Word.combine (ZNWord sz1 z1) (ZNWord sz2 z2) =
ZNWord (sz1 + sz2) (Z.lor z1 (Z.shiftl z2 (Z.of_nat sz1))).
- Proof.
+ Proof using Type.
cbv [ZNWord]; intros.
rewrite !Word.NToWord_nat.
match goal with |- ?a = _ => rewrite <- (Word.natToWord_wordToNat a) end.