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-rw-r--r--compiler/rustc_lint_defs/src/builtin.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/rustc_lint_defs/src/builtin.rs b/compiler/rustc_lint_defs/src/builtin.rs
index 8399f4c12f4..0718842f1bb 100644
--- a/compiler/rustc_lint_defs/src/builtin.rs
+++ b/compiler/rustc_lint_defs/src/builtin.rs
@@ -3595,7 +3595,7 @@ declare_lint! {
     ///
     /// [Other ABIs]: https://doc.rust-lang.org/reference/items/external-blocks.html#abi
     pub MISSING_ABI,
-    Allow,
+    Warn,
     "No declared ABI for extern declaration"
 }