2 files changed, 3 insertions, 5 deletions
diff --git a/compiler/rustc_codegen_ssa/src/back/lto.rs b/compiler/rustc_codegen_ssa/src/back/lto.rs
index 6dc8cb5038e..3c5b0e5cc43 100644
--- a/compiler/rustc_codegen_ssa/src/back/lto.rs
+++ b/compiler/rustc_codegen_ssa/src/back/lto.rs
@@ -68,10 +68,9 @@ impl<B: WriteBackendMethods> LtoModuleCodegen<B> {
         cgcx: &CodegenContext<B>,
     ) -> Result<ModuleCodegen<B::Module>, FatalError> {
         match self {
-            LtoModuleCodegen::Fat { module, .. } => {
+            LtoModuleCodegen::Fat { mut module, .. } => {
                 {
-                    let config = cgcx.config(module.kind);
-                    B::optimize_fat(cgcx, &module, config)?;
+                    B::optimize_fat(cgcx, &mut module)?;
                 }
                 Ok(module)
             }
diff --git a/compiler/rustc_codegen_ssa/src/traits/write.rs b/compiler/rustc_codegen_ssa/src/traits/write.rs
index ed0f6591809..e54ec34f1ce 100644
--- a/compiler/rustc_codegen_ssa/src/traits/write.rs
+++ b/compiler/rustc_codegen_ssa/src/traits/write.rs
@@ -43,8 +43,7 @@ pub trait WriteBackendMethods: 'static + Sized + Clone {
     ) -> Result<(), FatalError>;
     fn optimize_fat(
         cgcx: &CodegenContext<Self>,
-        llmod: &ModuleCodegen<Self::Module>,
-        config: &ModuleConfig,
+        llmod: &mut ModuleCodegen<Self::Module>,
     ) -> Result<(), FatalError>;
     unsafe fn optimize_thin(
         cgcx: &CodegenContext<Self>,