diff --git a/boot_control_android.cc b/boot_control_android.cc
index abf898e..7aa72c3 100644
--- a/boot_control_android.cc
+++ b/boot_control_android.cc
@@ -44,8 +44,6 @@
 
 namespace {
 
-constexpr char kZeroGuid[] = "00000000-0000-0000-0000-000000000000";
-
 auto StoreResultCallback(CommandResult* dest) {
   return [dest](const CommandResult& result) { *dest = result; };
 }
@@ -273,7 +271,6 @@
                 << BootControlInterface::SlotName(target_slot) << " in "
                 << super_device;
       if (builder->AddPartition(target_partition_name,
-                                kZeroGuid,
                                 LP_PARTITION_ATTR_READONLY) == nullptr) {
         LOG(ERROR) << "Cannot add partition " << target_partition_name;
         return false;
diff --git a/boot_control_android_unittest.cc b/boot_control_android_unittest.cc
index 9744b42..ea5e808 100644
--- a/boot_control_android_unittest.cc
+++ b/boot_control_android_unittest.cc
@@ -48,7 +48,6 @@
 constexpr const char* kFakeDevicePath = "/fake/dev/path/";
 constexpr const char* kFakeMappedPath = "/fake/mapped/path/";
 constexpr const uint32_t kFakeMetadataSize = 65536;
-constexpr const char* kZeroGuid = "00000000-0000-0000-0000-000000000000";
 
 // A map describing the size of each partition.
 using PartitionSizes = std::map<std::string, uint64_t>;
@@ -97,7 +96,7 @@
   if (builder == nullptr)
     return nullptr;
   for (const auto& pair : sizes) {
-    auto p = builder->AddPartition(pair.first, kZeroGuid, 0 /* attr */);
+    auto p = builder->AddPartition(pair.first, 0 /* attr */);
     EXPECT_TRUE(p && builder->ResizePartition(p, pair.second));
   }
   return builder;