diff --git a/api-docs/kotlin/src/main/kotlin/org/bitcoindevkit/bdk.kt b/api-docs/kotlin/src/main/kotlin/org/bitcoindevkit/bdk.kt
index 5accca1..837ebe4 100644
--- a/api-docs/kotlin/src/main/kotlin/org/bitcoindevkit/bdk.kt
+++ b/api-docs/kotlin/src/main/kotlin/org/bitcoindevkit/bdk.kt
@@ -246,7 +246,7 @@ class Blockchain(
     config: BlockchainConfig
 ) {
     /** Broadcast a transaction. */
-    fun broadcast(psbt: PartiallySignedBitcoinTransaction): String {}
+    fun broadcast(psbt: PartiallySignedBitcoinTransaction) {}
 
     /** Get the current height of the blockchain. */
     fun getHeight(): UInt {}