diff --git a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/BlockDecomposerLowering.kt b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/BlockDecomposerLowering.kt
index 122cc6d8bf0..96b4474f804 100644
--- a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/BlockDecomposerLowering.kt
+++ b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/BlockDecomposerLowering.kt
@@ -430,6 +430,8 @@ class BlockDecomposerTransformer(context: JsIrBackendContext) : IrElementTransfo
 
         override fun visitReturn(expression: IrReturn) = expression.asExpression(JsIrBuilder.buildCall(unreachableFunction.symbol, nothingType))
 
+        override fun visitVariable(declaration: IrVariable) = declaration.asExpression(unitValue)
+
         override fun visitStringConcatenation(expression: IrStringConcatenation): IrExpression {
             expression.transformChildrenVoid(expressionTransformer)