diff --git a/idea/jvm-debugger/jvm-debugger-core/src/org/jetbrains/kotlin/idea/debugger/stackFrame/CapturedValueData.kt b/idea/jvm-debugger/jvm-debugger-core/src/org/jetbrains/kotlin/idea/debugger/stackFrame/CapturedValueData.kt
index 2a1106ee871..4db1f0a0d2d 100644
--- a/idea/jvm-debugger/jvm-debugger-core/src/org/jetbrains/kotlin/idea/debugger/stackFrame/CapturedValueData.kt
+++ b/idea/jvm-debugger/jvm-debugger-core/src/org/jetbrains/kotlin/idea/debugger/stackFrame/CapturedValueData.kt
@@ -33,7 +33,7 @@ data class CapturedValueData(
     ) : ValueDescriptorImpl(delegate.project) {
         override fun getName() = valueName
 
-        override fun calcValue(evaluationContext: EvaluationContextImpl?): Value = delegate.calcValue(evaluationContext)
+        override fun calcValue(evaluationContext: EvaluationContextImpl?): Value? = delegate.calcValue(evaluationContext)
         override fun getDescriptorEvaluation(context: DebuggerContext?): PsiExpression = delegate.getDescriptorEvaluation(context)
         override fun getModifier(value: JavaValue?): XValueModifier = delegate.getModifier(value)
     }