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-rw-r--r--plugins/ring/Setoid_ring_theory.v1
1 files changed, 1 insertions, 0 deletions
diff --git a/plugins/ring/Setoid_ring_theory.v b/plugins/ring/Setoid_ring_theory.v
index 0444fe74ab..a42c3ff72b 100644
--- a/plugins/ring/Setoid_ring_theory.v
+++ b/plugins/ring/Setoid_ring_theory.v
@@ -8,6 +8,7 @@
Require Export Bool.
Require Export Setoid.
+Import Morphisms.
Set Implicit Arguments.