diff --git a/compiler/gen/src/llvm/build.rs b/compiler/gen/src/llvm/build.rs
index 4908b1684f..a7526a1b26 100644
--- a/compiler/gen/src/llvm/build.rs
+++ b/compiler/gen/src/llvm/build.rs
@@ -1877,6 +1877,8 @@ fn run_low_level<'a, 'ctx, 'env>(
         ListSetInPlace => {
             let (list_symbol, list_layout) = load_symbol_and_layout(env, scope, &args[0]);
 
+            let output_inplace = get_inplace_from_layout(layout);
+
             list_set(
                 parent,
                 &[
@@ -1886,6 +1888,7 @@ fn run_low_level<'a, 'ctx, 'env>(
                 ],
                 env,
                 InPlace::InPlace,
+                output_inplace,
             )
         }
         ListSet => {
@@ -1897,8 +1900,10 @@ fn run_low_level<'a, 'ctx, 'env>(
                 (load_symbol_and_layout(env, scope, &args[2])),
             ];
 
-            let in_place = || list_set(parent, arguments, env, InPlace::InPlace);
-            let clone = || list_set(parent, arguments, env, InPlace::Clone);
+            let output_inplace = get_inplace_from_layout(layout);
+
+            let in_place = || list_set(parent, arguments, env, InPlace::InPlace, output_inplace);
+            let clone = || list_set(parent, arguments, env, InPlace::Clone, output_inplace);
             let empty = || list_symbol;
 
             maybe_inplace_list(
diff --git a/compiler/gen/src/llvm/build_list.rs b/compiler/gen/src/llvm/build_list.rs
index a6cc41ddf3..d463824271 100644
--- a/compiler/gen/src/llvm/build_list.rs
+++ b/compiler/gen/src/llvm/build_list.rs
@@ -642,7 +642,8 @@ pub fn list_set<'a, 'ctx, 'env>(
     parent: FunctionValue<'ctx>,
     args: &[(BasicValueEnum<'ctx>, &'a Layout<'a>)],
     env: &Env<'a, 'ctx, 'env>,
-    inplace: InPlace,
+    input_inplace: InPlace,
+    output_inplace: InPlace,
 ) -> BasicValueEnum<'ctx> {
     let builder = env.builder;
 
@@ -664,14 +665,15 @@ pub fn list_set<'a, 'ctx, 'env>(
         let ctx = env.context;
         let elem_type = basic_type_from_layout(env.arena, ctx, elem_layout, env.ptr_bytes);
         let ptr_type = get_ptr_type(&elem_type, AddressSpace::Generic);
-        let (new_wrapper, array_data_ptr) = match inplace {
+
+        let (new_wrapper, array_data_ptr) = match input_inplace {
             InPlace::InPlace => (
                 original_wrapper,
                 load_list_ptr(builder, original_wrapper, ptr_type),
             ),
             InPlace::Clone => clone_nonempty_list(
                 env,
-                inplace,
+                output_inplace,
                 list_len,
                 load_list_ptr(builder, original_wrapper, ptr_type),
                 elem_layout,