diff --git a/src/librustc_trans/back/write.rs b/src/librustc_trans/back/write.rs
index 26cdca1cdbf4d8639f7935c53826c5fe69a62d74..2cbb88fed05c2c09b0ebdd49a9768b40cf93162d 100644
--- a/src/librustc_trans/back/write.rs
+++ b/src/librustc_trans/back/write.rs
@@ -502,7 +502,7 @@ fn drop(&mut self) {
             let msg = llvm::build_string(|s| {
                 llvm::LLVMRustWriteDiagnosticInfoToString(diagnostic_ref, s)
             }).expect("non-UTF8 PGO diagnostic");
-            diag_handler.note_without_error(&msg);
+            diag_handler.warn(&msg);
         }
         llvm::diagnostic::UnknownDiagnostic(..) => {},
     }