diff --git a/include/evmc/helpers.hpp b/include/evmc/helpers.hpp
index 9e404ad..d4624ae 100644
--- a/include/evmc/helpers.hpp
+++ b/include/evmc/helpers.hpp
@@ -1,6 +1,6 @@
 /* EVMC: Ethereum Client-VM Connector API.
- * Copyright 2018 The EVMC Authors.
- * Licensed under the Apache License, Version 2.0. See the LICENSE file.
+ * Copyright 2019 The EVMC Authors.
+ * Licensed under the Apache License, Version 2.0.
  */
 
 /**
@@ -41,6 +41,18 @@ inline bool operator==(const evmc_bytes32& a, const evmc_bytes32& b)
     return std::memcmp(a.bytes, b.bytes, sizeof(a.bytes)) == 0;
 }
 
+/// Check if the address is zero (all bytes are zeros).
+inline bool is_zero(const evmc_address& address) noexcept
+{
+    return address == evmc_address{};
+}
+
+/// Check if the hash is zero (all bytes are zeros).
+inline bool is_zero(const evmc_bytes32& x) noexcept
+{
+    return x == evmc_bytes32{};
+}
+
 /// FNV1a hash function with 64-bit result.
 inline uint64_t fnv1a_64(const uint8_t* ptr, size_t len)
 {
diff --git a/test/unittests/test_helpers.cpp b/test/unittests/test_helpers.cpp
index b199146..76cf740 100644
--- a/test/unittests/test_helpers.cpp
+++ b/test/unittests/test_helpers.cpp
@@ -1,6 +1,6 @@
 // EVMC: Ethereum Client-VM Connector API.
-// Copyright 2018 The EVMC Authors.
-// Licensed under the Apache License, Version 2.0. See the LICENSE file.
+// Copyright 2019 The EVMC Authors.
+// Licensed under the Apache License, Version 2.0.
 
 #include <evmc/helpers.hpp>
 
@@ -27,3 +27,16 @@ TEST(helpers, maps)
     unordered_storage.emplace(*storage.begin());
     EXPECT_EQ(unordered_storage.size(), 1);
 }
+
+TEST(helpers, is_zero)
+{
+    auto a = evmc_address{};
+    EXPECT_TRUE(is_zero(a));
+    a.bytes[0] = 1;
+    EXPECT_FALSE(is_zero(a));
+
+    auto b = evmc_bytes32{};
+    EXPECT_TRUE(is_zero(b));
+    b.bytes[0] = 1;
+    EXPECT_FALSE(is_zero(b));
+}