diff --git a/perftestcordapp/src/main/kotlin/com/r3/corda/enterprise/perftestcordapp/flows/LinearStateBatchNotariseFlow.kt b/perftestcordapp/src/main/kotlin/com/r3/corda/enterprise/perftestcordapp/flows/LinearStateBatchNotariseFlow.kt
index 2af5d11837..b24dcba032 100644
--- a/perftestcordapp/src/main/kotlin/com/r3/corda/enterprise/perftestcordapp/flows/LinearStateBatchNotariseFlow.kt
+++ b/perftestcordapp/src/main/kotlin/com/r3/corda/enterprise/perftestcordapp/flows/LinearStateBatchNotariseFlow.kt
@@ -136,7 +136,7 @@ class LinearStateBatchNotariseFlow(private val notary: Party,
     }
 
     @CordaSerializable
-    data class Result(val measurements: LinkedList<Measurement>)
+    data class Result(val measurements: List<Measurement>)
 
     @CordaSerializable
     data class Measurement(val start: Instant, val end: Instant, val delay: Duration)
diff --git a/tools/jmeter/src/main/kotlin/com/r3/corda/jmeter/Samplers.kt b/tools/jmeter/src/main/kotlin/com/r3/corda/jmeter/Samplers.kt
index 89feff8613..5a62af2dcc 100644
--- a/tools/jmeter/src/main/kotlin/com/r3/corda/jmeter/Samplers.kt
+++ b/tools/jmeter/src/main/kotlin/com/r3/corda/jmeter/Samplers.kt
@@ -187,7 +187,7 @@ class LinearStateBatchNotariseSampler : AbstractSampler() {
 
     override fun additionalFlowResponseProcessing(context: JavaSamplerContext, sample: SampleResult, response: Any?) {
         if (response is LinearStateBatchNotariseFlow.Result && response.measurements.isNotEmpty()) {
-            measurements.add(response.measurements)
+            measurements.add(LinkedList(response.measurements))
             measurementsSize += response.measurements.size
         }
         this.sample = sample
@@ -232,4 +232,4 @@ class LinearStateBatchNotariseSampler : AbstractSampler() {
         }
         return result
     }
-}
\ No newline at end of file
+}