diff --git a/core/src/main/kotlin/com/r3corda/core/transactions/SignedTransaction.kt b/core/src/main/kotlin/com/r3corda/core/transactions/SignedTransaction.kt
index 381c02ec7e..91d67ecfbd 100644
--- a/core/src/main/kotlin/com/r3corda/core/transactions/SignedTransaction.kt
+++ b/core/src/main/kotlin/com/r3corda/core/transactions/SignedTransaction.kt
@@ -89,7 +89,6 @@ data class SignedTransaction(val txBits: SerializedBytes<WireTransaction>,
      * Returns the set of missing signatures - a signature must be present for each signer public key.
      */
     private fun getMissingSignatures(): Set<PublicKey> {
-        val notaryKey = tx.notary?.owningKey
         val requiredKeys = tx.signers.toSet()
         val sigKeys = sigs.map { it.by }.toSet()