diff --git a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/IrDeclarationToJsTransformer.kt b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/IrDeclarationToJsTransformer.kt
index e6d2db3242b..7ba9b9c1803 100644
--- a/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/IrDeclarationToJsTransformer.kt
+++ b/compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/IrDeclarationToJsTransformer.kt
@@ -7,10 +7,7 @@ package org.jetbrains.kotlin.ir.backend.js.transformers.irToJs
 
 import org.jetbrains.kotlin.ir.backend.js.utils.JsGenerationContext
 import org.jetbrains.kotlin.ir.declarations.*
-import org.jetbrains.kotlin.js.backend.ast.JsEmpty
-import org.jetbrains.kotlin.js.backend.ast.JsGlobalBlock
-import org.jetbrains.kotlin.js.backend.ast.JsStatement
-import org.jetbrains.kotlin.js.backend.ast.JsVars
+import org.jetbrains.kotlin.js.backend.ast.*
 
 @Suppress("PARAMETER_NAME_CHANGED_ON_OVERRIDE")
 class IrDeclarationToJsTransformer : BaseIrElementToJsNodeTransformer<JsStatement, JsGenerationContext> {
@@ -31,6 +28,11 @@ class IrDeclarationToJsTransformer : BaseIrElementToJsNodeTransformer<JsStatemen
         ).generate()
     }
 
+    override fun visitErrorDeclaration(declaration: IrErrorDeclaration, data: JsGenerationContext): JsStatement {
+        // To avoid compiler crash with UnimplementedException just in case I added this visitor to catch uncovered cases
+        return JsSingleLineComment("\$error code: declaration")
+    }
+
     override fun visitField(declaration: IrField, context: JsGenerationContext): JsStatement {
         val fieldName = context.getNameForField(declaration)