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-rw-r--r--theories/Classes/RelationPairs.v1
1 files changed, 1 insertions, 0 deletions
diff --git a/theories/Classes/RelationPairs.v b/theories/Classes/RelationPairs.v
index cbde5f9ab..8ce3e4b6b 100644
--- a/theories/Classes/RelationPairs.v
+++ b/theories/Classes/RelationPairs.v
@@ -42,6 +42,7 @@ Generalizable Variables A B RA RB Ri Ro f.
Definition RelCompFun {A} {B : Type}(R:relation B)(f:A->B) : relation A :=
fun a a' => R (f a) (f a').
+Typeclasses Opaque RelCompFun.
Infix "@@" := RelCompFun (at level 30, right associativity) : signature_scope.