diff --git a/src/System.Numerics.Vectors/src/ApiCompatBaseline.uapaot.txt b/src/System.Numerics.Vectors/src/ApiCompatBaseline.uapaot.txt
new file mode 100644
index 000000000000..bc7a12f52664
--- /dev/null
+++ b/src/System.Numerics.Vectors/src/ApiCompatBaseline.uapaot.txt
@@ -0,0 +1 @@
+MembersMustExist : Member 'System.Numerics.Vector<T>..ctor(System.Span<T>)' does not exist in the implementation but it does exist in the contract.
\ No newline at end of file