diff --git a/bitcoincore/src/main/kotlin/io/horizontalsystems/bitcoincore/transactions/TransactionExtractor.kt b/bitcoincore/src/main/kotlin/io/horizontalsystems/bitcoincore/transactions/TransactionExtractor.kt
index e43d9f1a3..2f9eed28b 100644
--- a/bitcoincore/src/main/kotlin/io/horizontalsystems/bitcoincore/transactions/TransactionExtractor.kt
+++ b/bitcoincore/src/main/kotlin/io/horizontalsystems/bitcoincore/transactions/TransactionExtractor.kt
@@ -173,7 +173,7 @@ class TransactionExtractor(private val addressConverter: IAddressConverter, priv
     }
 
     private fun isNullData(lockingScript: ByteArray): Boolean {
-        return lockingScript[0] == OP_RETURN.toByte()
+        return lockingScript.isNotEmpty() && lockingScript[0] == OP_RETURN.toByte()
     }
 
     //