diff --git a/libs/android_runtime_lazy/Android.bp b/libs/android_runtime_lazy/Android.bp
index 2d6292c..9284acb 100644
--- a/libs/android_runtime_lazy/Android.bp
+++ b/libs/android_runtime_lazy/Android.bp
@@ -34,7 +34,6 @@
     name: "libandroid_runtime_lazy",
     vendor_available: true,
     double_loadable: true,
-    host_supported: true,
 
     cflags: [
         "-Wall",
diff --git a/libs/binder/ndk/Android.bp b/libs/binder/ndk/Android.bp
index 8512471..734a928 100644
--- a/libs/binder/ndk/Android.bp
+++ b/libs/binder/ndk/Android.bp
@@ -14,25 +14,9 @@
  * limitations under the License.
  */
 
-// TODO(b/31559095): bionic on host should define this
-cc_defaults {
-    name: "libbinder_ndk_host_user",
-    target: {
-        host: {
-            cflags: [
-                "-D__INTRODUCED_IN(n)=",
-                "-D__assert(a,b,c)=",
-            ],
-        },
-    },
-}
-
 cc_library_shared {
     name: "libbinder_ndk",
 
-    defaults: ["libbinder_ndk_host_user"],
-    host_supported: true,
-
     export_include_dirs: [
         "include_ndk",
         "include_platform",
diff --git a/libs/binder/ndk/include_ndk/android/binder_parcel.h b/libs/binder/ndk/include_ndk/android/binder_parcel.h
index 8c41707..2258210 100644
--- a/libs/binder/ndk/include_ndk/android/binder_parcel.h
+++ b/libs/binder/ndk/include_ndk/android/binder_parcel.h
@@ -26,7 +26,6 @@
 
 #pragma once
 
-#include <stddef.h>
 #include <sys/cdefs.h>
 
 #include <android/binder_status.h>