diff --git a/powerauth-java-crypto/src/main/java/io/getlime/security/powerauth/crypto/lib/encryptor/ecies/ClientEciesEncryptor.java b/powerauth-java-crypto/src/main/java/io/getlime/security/powerauth/crypto/lib/encryptor/ecies/ClientEciesEncryptor.java
index a7eb39543..86cd1792e 100644
--- a/powerauth-java-crypto/src/main/java/io/getlime/security/powerauth/crypto/lib/encryptor/ecies/ClientEciesEncryptor.java
+++ b/powerauth-java-crypto/src/main/java/io/getlime/security/powerauth/crypto/lib/encryptor/ecies/ClientEciesEncryptor.java
@@ -159,7 +159,7 @@ public EncryptedRequest encryptRequest(byte[] data) throws EncryptorException {
                 base64Encoder.encodeToString(eciesCryptogram.getEphemeralPublicKey()),
                 base64Encoder.encodeToString(eciesCryptogram.getEncryptedData()),
                 base64Encoder.encodeToString(eciesCryptogram.getMac()),
-                validator.isUseNonceForRequest() ? base64Encoder.encodeToString(requestNonce) : null,
+                validator.isUseNonceForRequest() && requestNonce != null ? base64Encoder.encodeToString(requestNonce) : null,
                 requestTimestamp
         );
     }