diff --git a/_CoqProject b/_CoqProject
index 8a8ef0b08a202d7e2a222d400b22a7e5008e84d7..82e078a7803426e8bcdb98af866291c34859c76a 100644
--- a/_CoqProject
+++ b/_CoqProject
@@ -8,6 +8,8 @@
 # Cannot use non-canonical projections as it causes massive unification failures
 # (https://github.com/coq/coq/issues/6294).
 -arg -w -arg -redundant-canonical-projection
+# Warning is often incorrect, see https://gitlab.mpi-sws.org/iris/stdpp/-/issues/216
+-arg -w -arg -notation-incompatible-prefix
 
 lifetime/model/definitions.v
 lifetime/model/faking.v