diff --git a/src/allocator.rs b/src/allocator.rs
index 0d01cfd3239..b4a3825e996 100644
--- a/src/allocator.rs
+++ b/src/allocator.rs
@@ -11,7 +11,7 @@
 use crate::prelude::*;
 
 /// Returns whether an allocator shim was created
-pub(crate) fn codegen(tcx: TyCtxt<'_>, module: &mut impl Module) -> bool {
+pub(crate) fn codegen(tcx: TyCtxt<'_>, module: &mut dyn Module) -> bool {
     let Some(kind) = allocator_kind_for_codegen(tcx) else { return false };
     codegen_inner(
         module,
@@ -23,7 +23,7 @@ pub(crate) fn codegen(tcx: TyCtxt<'_>, module: &mut impl Module) -> bool {
 }
 
 fn codegen_inner(
-    module: &mut impl Module,
+    module: &mut dyn Module,
     kind: AllocatorKind,
     alloc_error_handler_kind: AllocatorKind,
     oom_strategy: OomStrategy,
diff --git a/src/main_shim.rs b/src/main_shim.rs
index 3e85abde14e..33d3f9b8a90 100644
--- a/src/main_shim.rs
+++ b/src/main_shim.rs
@@ -11,7 +11,7 @@
 /// users main function.
 pub(crate) fn maybe_create_entry_wrapper(
     tcx: TyCtxt<'_>,
-    module: &mut impl Module,
+    module: &mut dyn Module,
     is_jit: bool,
     is_primary_cgu: bool,
 ) {
@@ -39,7 +39,7 @@ pub(crate) fn maybe_create_entry_wrapper(
 
     fn create_entry_fn(
         tcx: TyCtxt<'_>,
-        m: &mut impl Module,
+        m: &mut dyn Module,
         rust_main_def_id: DefId,
         ignore_lang_start_wrapper: bool,
         is_main_fn: bool,