diff --git a/api/sixtyfps-cpp/include/sixtyfps_interpreter.h b/api/sixtyfps-cpp/include/sixtyfps_interpreter.h
index 8153d75df..87bdf43f8 100644
--- a/api/sixtyfps-cpp/include/sixtyfps_interpreter.h
+++ b/api/sixtyfps-cpp/include/sixtyfps_interpreter.h
@@ -376,14 +376,14 @@ public:
     {
         using namespace cbindgen_private;
         return sixtyfps_interpreter_component_instance_set_property(
-                &inner, Slice<uint8_t>::from_string(name), &value.inner);
+                &inner, sixtyfps::private_api::string_to_slice(name), &value.inner);
     }
     std::optional<Value> get_property(std::string_view name) const
     {
         using namespace cbindgen_private;
         ValueOpaque out;
         if (sixtyfps_interpreter_component_instance_get_property(
-                    &inner, Slice<uint8_t>::from_string(name), &out)) {
+                    &inner, sixtyfps::private_api::string_to_slice(name), &out)) {
             return Value(out);
         } else {
             return {};
@@ -396,7 +396,7 @@ public:
         Slice<ValueOpaque> args_view { reinterpret_cast<ValueOpaque *>(args.ptr), args.len };
         ValueOpaque out;
         if (sixtyfps_interpreter_component_instance_invoke_callback(
-                    &inner, Slice<uint8_t>::from_string(name), args_view, &out)) {
+                    &inner, sixtyfps::private_api::string_to_slice(name), args_view, &out)) {
             return Value(out);
         } else {
             return {};
@@ -413,8 +413,8 @@ public:
             new (ret) Value(std::move(r));
         };
         return cbindgen_private::sixtyfps_interpreter_component_instance_set_callback(
-                &inner, Slice<uint8_t>::from_string(name), actual_cb, new F(std::move(callback)),
-                [](void *data) { delete reinterpret_cast<F *>(data); });
+                &inner, sixtyfps::private_api::string_to_slice(name), actual_cb,
+                new F(std::move(callback)), [](void *data) { delete reinterpret_cast<F *>(data); });
     }
 };
 
diff --git a/xtask/src/cbindgen.rs b/xtask/src/cbindgen.rs
index 9efba43f8..96922af64 100644
--- a/xtask/src/cbindgen.rs
+++ b/xtask/src/cbindgen.rs
@@ -103,15 +103,15 @@ fn gen_corelib(root_dir: &Path, include_dir: &Path) -> anyhow::Result<()> {
 
     let mut string_config = config.clone();
     string_config.export.exclude = vec!["SharedString".into()];
-    string_config.export.body.insert(
-        "Slice".to_owned(),
-        " static Slice<T> from_string(std::string_view str)  {
-                 return {
+    string_config.trailer = Some(
+        "namespace sixtyfps::private_api {
+             cbindgen_private::Slice<uint8_t> string_to_slice(std::string_view str)  {
+                 return cbindgen_private::Slice<uint8_t> {
                      const_cast<unsigned char *>(reinterpret_cast<const unsigned char *>(str.data())),
                      str.size()
                  };
-            }"
-            .to_owned(),
+            }
+        }".to_owned(),
     );
 
     cbindgen::Builder::new()