diff --git a/Userland/Libraries/LibCrypto/BigInt/SignedBigInteger.h b/Userland/Libraries/LibCrypto/BigInt/SignedBigInteger.h
index 3037e0d81c..78b6994446 100644
--- a/Userland/Libraries/LibCrypto/BigInt/SignedBigInteger.h
+++ b/Userland/Libraries/LibCrypto/BigInt/SignedBigInteger.h
@@ -72,6 +72,7 @@ public:
     [[nodiscard]] UnsignedBigInteger const& unsigned_value() const { return m_unsigned_data; }
     [[nodiscard]] Vector<u32, STARTING_WORD_SIZE> const words() const { return m_unsigned_data.words(); }
     [[nodiscard]] bool is_negative() const { return m_sign; }
+    [[nodiscard]] bool is_zero() const { return m_unsigned_data.is_zero(); }
 
     void negate()
     {