diff --git a/pw_kvs/fake_flash_memory.cc b/pw_kvs/fake_flash_memory.cc
index 39f5590..217870c 100644
--- a/pw_kvs/fake_flash_memory.cc
+++ b/pw_kvs/fake_flash_memory.cc
@@ -131,4 +131,16 @@
   return StatusWithSize(status, data.size());
 }
 
+std::byte* FakeFlashMemory::FlashAddressToMcuAddress(Address address) const {
+  if (address > sector_count() * sector_size_bytes()) {
+    PW_LOG_ERROR(
+        "FlashAddressToMcuAddress beyond end of memory; address %x, max "
+        "address %x",
+        unsigned(address),
+        unsigned(sector_count() * sector_size_bytes()));
+    return nullptr;
+  }
+  return buffer_.data() + address;
+}
+
 }  // namespace pw::kvs
diff --git a/pw_kvs/public/pw_kvs/fake_flash_memory.h b/pw_kvs/public/pw_kvs/fake_flash_memory.h
index 5dc839c..a2f9bbb 100644
--- a/pw_kvs/public/pw_kvs/fake_flash_memory.h
+++ b/pw_kvs/public/pw_kvs/fake_flash_memory.h
@@ -116,6 +116,8 @@
   StatusWithSize Write(Address address,
                        std::span<const std::byte> data) override;
 
+  std::byte* FlashAddressToMcuAddress(Address) const override;
+
   // Testing API
 
   // Access the underlying buffer for testing purposes. Not part of the