diff --git a/core/fxcrt/fx_memory.h b/core/fxcrt/fx_memory.h
index 8157eb2..2ae5003 100644
--- a/core/fxcrt/fx_memory.h
+++ b/core/fxcrt/fx_memory.h
@@ -59,6 +59,7 @@
 // FX_Free accepts memory from all of the above.
 void FX_Free(void* ptr);
 
+#ifndef V8_ENABLE_SANDBOX
 // V8 Array Buffer Partition Allocators.
 
 // This never returns nullptr, and returns zeroed memory.
@@ -69,6 +70,7 @@
 
 // FX_ArrayBufferFree accepts memory from both of the above.
 void FX_ArrayBufferFree(void* data);
+#endif  // V8_ENABLE_SANDBOX
 
 namespace pdfium {
 namespace internal {
diff --git a/core/fxcrt/fx_memory_pa.cpp b/core/fxcrt/fx_memory_pa.cpp
index e0d72d6..f68bc78 100644
--- a/core/fxcrt/fx_memory_pa.cpp
+++ b/core/fxcrt/fx_memory_pa.cpp
@@ -22,11 +22,13 @@
     partition_alloc::PartitionOptions::UseConfigurablePool::kNo,
 };
 
+#ifndef V8_ENABLE_SANDBOX
 partition_alloc::PartitionAllocator& GetArrayBufferPartitionAllocator() {
   static pdfium::base::NoDestructor<partition_alloc::PartitionAllocator>
       s_array_buffer_allocator;
   return *s_array_buffer_allocator;
 }
+#endif  //  V8_ENABLE_SANDBOX
 
 partition_alloc::PartitionAllocator& GetGeneralPartitionAllocator() {
   static pdfium::base::NoDestructor<partition_alloc::PartitionAllocator>
@@ -97,13 +99,16 @@
   static bool s_partition_allocators_initialized = false;
   if (!s_partition_allocators_initialized) {
     partition_alloc::PartitionAllocGlobalInit(FX_OutOfMemoryTerminate);
+#ifndef V8_ENABLE_SANDBOX
     GetArrayBufferPartitionAllocator().init(kOptions);
+#endif  // V8_ENABLE_SANDBOX
     GetGeneralPartitionAllocator().init(kOptions);
     GetStringPartitionAllocator().init(kOptions);
     s_partition_allocators_initialized = true;
   }
 }
 
+#ifndef V8_ENABLE_SANDBOX
 void* FX_ArrayBufferAllocate(size_t length) {
   return GetArrayBufferPartitionAllocator().root()->AllocWithFlags(
       partition_alloc::AllocFlags::kZeroFill, length, "FXArrayBuffer");
@@ -117,6 +122,7 @@
 void FX_ArrayBufferFree(void* data) {
   GetArrayBufferPartitionAllocator().root()->Free(data);
 }
+#endif  // V8_ENABLE_SANDBOX
 
 void FX_Free(void* ptr) {
   // TODO(palmer): Removing this check exposes crashes when PDFium callers