diff --git a/src/librustc_codegen_llvm/back/write.rs b/src/librustc_codegen_llvm/back/write.rs
index 467782518f67..0ffb83ff3378 100644
--- a/src/librustc_codegen_llvm/back/write.rs
+++ b/src/librustc_codegen_llvm/back/write.rs
@@ -399,6 +399,9 @@ pub(crate) fn save_temp_bitcode(&self, module: &ModuleCodegen, name: &str) {
 }
 
 struct DiagnosticHandlers<'a> {
+    #[allow(dead_code)]
+    // This value is not actually dead, llcx has pointers to it and needs these pointers to be alive
+    // until Drop is executed on this object
     inner: Box<(&'a CodegenContext, &'a Handler)>,
     llcx: ContextRef,
 }