diff --git a/Libraries/LibCrypto/PK/RSA.h b/Libraries/LibCrypto/PK/RSA.h
index 1d3a074c756..ea0d12815e0 100644
--- a/Libraries/LibCrypto/PK/RSA.h
+++ b/Libraries/LibCrypto/PK/RSA.h
@@ -121,6 +121,10 @@ public:
 
     ErrorOr<ByteBuffer> export_as_der() const
     {
+        if (m_prime_1.is_zero() || m_prime_2.is_zero()) {
+            return Error::from_string_literal("Cannot export private key without prime factors");
+        }
+
         ASN1::Encoder encoder;
         TRY(encoder.write_constructed(ASN1::Class::Universal, ASN1::Kind::Sequence, [&]() -> ErrorOr<void> {
             TRY(encoder.write(0x00u)); // version