diff --git a/libs/binder/Parcel.cpp b/libs/binder/Parcel.cpp
index ee26997..1131732 100644
--- a/libs/binder/Parcel.cpp
+++ b/libs/binder/Parcel.cpp
@@ -509,7 +509,7 @@
     }
 }
 
-#ifdef __ANDROID_VNDK__
+#if defined(__ANDROID_VNDK__) && !defined(__ANDROID_APEX__)
 constexpr int32_t kHeader = B_PACK_CHARS('V', 'N', 'D', 'R');
 #else
 constexpr int32_t kHeader = B_PACK_CHARS('S', 'Y', 'S', 'T');