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-rw-r--r--theories/Numbers/Integer/BigZ/ZMake.v1
1 files changed, 1 insertions, 0 deletions
diff --git a/theories/Numbers/Integer/BigZ/ZMake.v b/theories/Numbers/Integer/BigZ/ZMake.v
index cbf6f701f..5376027dd 100644
--- a/theories/Numbers/Integer/BigZ/ZMake.v
+++ b/theories/Numbers/Integer/BigZ/ZMake.v
@@ -30,6 +30,7 @@ Module Make (N:NType) <: ZType.
| Neg : N.t -> t_.
Definition t := t_.
+ Typeclasses unfold t.
Definition zero := Pos N.zero.
Definition one := Pos N.one.