diff --git a/libs/binder/ndk/include_cpp/android/binder_auto_utils.h b/libs/binder/ndk/include_cpp/android/binder_auto_utils.h
index 53871f2..6b52c0a 100644
--- a/libs/binder/ndk/include_cpp/android/binder_auto_utils.h
+++ b/libs/binder/ndk/include_cpp/android/binder_auto_utils.h
@@ -259,10 +259,13 @@
     const char* getMessage() const { return AStatus_getMessage(get()); }
 
     std::string getDescription() const {
-        const char* cStr = AStatus_getDescription(get());
-        std::string ret = cStr;
-        AStatus_deleteDescription(cStr);
-        return ret;
+        if (__builtin_available(android 30, *)) {
+            const char* cStr = AStatus_getDescription(get());
+            std::string ret = cStr;
+            AStatus_deleteDescription(cStr);
+            return ret;
+        }
+        return "(not available)";
     }
 
     /**
diff --git a/libs/binder/ndk/include_cpp/android/binder_interface_utils.h b/libs/binder/ndk/include_cpp/android/binder_interface_utils.h
index a1102e2..05eb64b 100644
--- a/libs/binder/ndk/include_cpp/android/binder_interface_utils.h
+++ b/libs/binder/ndk/include_cpp/android/binder_interface_utils.h
@@ -247,7 +247,7 @@
     // ourselves. The defaults are harmless.
     AIBinder_Class_setOnDump(clazz, ICInterfaceData::onDump);
 #ifdef HAS_BINDER_SHELL_COMMAND
-    if (AIBinder_Class_setHandleShellCommand != nullptr) {
+    if (__builtin_available(android 30, *)) {
         AIBinder_Class_setHandleShellCommand(clazz, ICInterfaceData::handleShellCommand);
     }
 #endif
diff --git a/libs/binder/ndk/include_cpp/android/binder_parcelable_utils.h b/libs/binder/ndk/include_cpp/android/binder_parcelable_utils.h
index 6636a41..2277148 100644
--- a/libs/binder/ndk/include_cpp/android/binder_parcelable_utils.h
+++ b/libs/binder/ndk/include_cpp/android/binder_parcelable_utils.h
@@ -51,14 +51,27 @@
 
     binder_status_t writeToParcel(AParcel* parcel) const {
         RETURN_ON_FAILURE(AParcel_writeInt32(parcel, static_cast<int32_t>(this->mStability)));
-        RETURN_ON_FAILURE(AParcel_writeInt32(parcel, AParcel_getDataSize(this->mParcel.get())));
-        RETURN_ON_FAILURE(AParcel_appendFrom(this->mParcel.get(), parcel, 0,
-                                             AParcel_getDataSize(this->mParcel.get())));
+        if (__builtin_available(android 31, *)) {
+            int32_t size = AParcel_getDataSize(this->mParcel.get());
+            RETURN_ON_FAILURE(AParcel_writeInt32(parcel, size));
+        } else {
+            return STATUS_INVALID_OPERATION;
+        }
+        if (__builtin_available(android 31, *)) {
+            int32_t size = AParcel_getDataSize(this->mParcel.get());
+            RETURN_ON_FAILURE(AParcel_appendFrom(this->mParcel.get(), parcel, 0, size));
+        } else {
+            return STATUS_INVALID_OPERATION;
+        }
         return STATUS_OK;
     }
 
     binder_status_t readFromParcel(const AParcel* parcel) {
-        AParcel_reset(mParcel.get());
+        if (__builtin_available(android 31, *)) {
+            AParcel_reset(mParcel.get());
+        } else {
+            return STATUS_INVALID_OPERATION;
+        }
 
         RETURN_ON_FAILURE(AParcel_readInt32(parcel, &this->mStability));
         int32_t dataSize;
@@ -74,7 +87,11 @@
             return STATUS_BAD_VALUE;
         }
 
-        status = AParcel_appendFrom(parcel, mParcel.get(), dataStartPos, dataSize);
+        if (__builtin_available(android 31, *)) {
+            status = AParcel_appendFrom(parcel, mParcel.get(), dataStartPos, dataSize);
+        } else {
+            status = STATUS_INVALID_OPERATION;
+        }
         if (status != STATUS_OK) {
             return status;
         }
@@ -86,7 +103,11 @@
         if (this->mStability > T::_aidl_stability) {
             return STATUS_BAD_VALUE;
         }
-        AParcel_reset(mParcel.get());
+        if (__builtin_available(android 31, *)) {
+            AParcel_reset(mParcel.get());
+        } else {
+            return STATUS_INVALID_OPERATION;
+        }
         AParcel_writeString(mParcel.get(), T::descriptor, strlen(T::descriptor));
         p.writeToParcel(mParcel.get());
         return STATUS_OK;
@@ -96,9 +117,13 @@
     binder_status_t getParcelable(std::optional<T>* ret) const {
         const std::string parcelableDesc(T::descriptor);
         AParcel_setDataPosition(mParcel.get(), 0);
-        if (AParcel_getDataSize(mParcel.get()) == 0) {
-            *ret = std::nullopt;
-            return STATUS_OK;
+        if (__builtin_available(android 31, *)) {
+            if (AParcel_getDataSize(mParcel.get()) == 0) {
+                *ret = std::nullopt;
+                return STATUS_OK;
+            }
+        } else {
+            return STATUS_INVALID_OPERATION;
         }
         std::string parcelableDescInParcel;
         binder_status_t status = AParcel_readString(mParcel.get(), &parcelableDescInParcel);
@@ -115,7 +140,11 @@
         return STATUS_OK;
     }
 
-    void reset() { AParcel_reset(mParcel.get()); }
+    void reset() {
+        if (__builtin_available(android 31, *)) {
+            AParcel_reset(mParcel.get());
+        }
+    }
 
     inline bool operator!=(const AParcelableHolder& rhs) const { return this != &rhs; }
     inline bool operator<(const AParcelableHolder& rhs) const { return this < &rhs; }
diff --git a/libs/binder/ndk/include_ndk/android/binder_parcel.h b/libs/binder/ndk/include_ndk/android/binder_parcel.h
index 93c3f32..ab67017 100644
--- a/libs/binder/ndk/include_ndk/android/binder_parcel.h
+++ b/libs/binder/ndk/include_ndk/android/binder_parcel.h
@@ -1120,7 +1120,6 @@
 // @END-PRIMITIVE-READ-WRITE
 
 #endif  //__ANDROID_API__ >= 29
-#if __ANDROID_API__ >= 31
 /**
  * Reset the parcel to the initial status.
  *
@@ -1166,7 +1165,6 @@
  * \return A parcel which is not related to any IBinder objects.
  */
 AParcel* AParcel_create() __INTRODUCED_IN(31);
-#endif  //__ANDROID_API__ >= 31
 __END_DECLS
 
 /** @} */