1 files changed, 1 insertions, 0 deletions
diff --git a/clippy_lints/src/strings.rs b/clippy_lints/src/strings.rs
index b2f4b310915..5b588e914fd 100644
--- a/clippy_lints/src/strings.rs
+++ b/clippy_lints/src/strings.rs
@@ -292,6 +292,7 @@ impl<'tcx> LateLintPass<'tcx> for StringLitAsBytes {
         }
 
         if_chain! {
+            if !in_external_macro(cx.sess(), e.span);
             if let ExprKind::MethodCall(path, receiver, ..) = &e.kind;
             if path.ident.name == sym!(as_bytes);
             if let ExprKind::Lit(lit) = &receiver.kind;