diff --git a/compiler/frontend/src/org/jetbrains/kotlin/cfg/ControlFlowProcessor.kt b/compiler/frontend/src/org/jetbrains/kotlin/cfg/ControlFlowProcessor.kt
index c6a601627e4..fef0b43d94e 100644
--- a/compiler/frontend/src/org/jetbrains/kotlin/cfg/ControlFlowProcessor.kt
+++ b/compiler/frontend/src/org/jetbrains/kotlin/cfg/ControlFlowProcessor.kt
@@ -884,7 +884,7 @@ class ControlFlowProcessor(private val trace: BindingTrace) {
             builder.declareParameter(parameter)
             val defaultValue = parameter.defaultValue
             if (defaultValue != null) {
-                val skipDefaultValue = builder.createUnboundLabel("after default value for parameter " + parameter.name!!)
+                val skipDefaultValue = builder.createUnboundLabel("after default value for parameter ${parameter.name ?: "<anonymous>"}")
                 builder.nondeterministicJump(skipDefaultValue, defaultValue, null)
                 generateInstructions(defaultValue)
                 builder.bindLabel(skipDefaultValue)