diff --git a/js/js.translator/src/org/jetbrains/kotlin/js/translate/intrinsic/operation/AssignmentBOIF.kt b/js/js.translator/src/org/jetbrains/kotlin/js/translate/intrinsic/operation/AssignmentBOIF.kt
deleted file mode 100644
index 024e0862f03..00000000000
--- a/js/js.translator/src/org/jetbrains/kotlin/js/translate/intrinsic/operation/AssignmentBOIF.kt
+++ /dev/null
@@ -1,44 +0,0 @@
-/*
- * Copyright 2010-2017 JetBrains s.r.o.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.jetbrains.kotlin.js.translate.intrinsic.operation
-
-import com.google.common.collect.ImmutableSet
-import org.jetbrains.kotlin.builtins.KotlinBuiltIns
-import org.jetbrains.kotlin.descriptors.FunctionDescriptor
-import org.jetbrains.kotlin.js.backend.ast.JsBinaryOperation
-import org.jetbrains.kotlin.js.backend.ast.JsExpression
-import org.jetbrains.kotlin.js.translate.context.TranslationContext
-import org.jetbrains.kotlin.js.translate.operation.OperatorTable
-import org.jetbrains.kotlin.js.translate.utils.PsiUtils
-import org.jetbrains.kotlin.js.translate.utils.TranslationUtils
-import org.jetbrains.kotlin.lexer.KtTokens
-import org.jetbrains.kotlin.psi.KtBinaryExpression
-import org.jetbrains.kotlin.types.KotlinType
-
-object AssignmentBOIF : BinaryOperationIntrinsicFactory {
-    override fun getSupportTokens() = ImmutableSet.of(KtTokens.EQ)
-
-    override fun getIntrinsic(descriptor: FunctionDescriptor, leftType: KotlinType?, rightType: KotlinType?): BinaryOperationIntrinsic? {
-        if (leftType != null && !KotlinBuiltIns.isCharOrNullableChar(leftType) && rightType != null && KotlinBuiltIns.isCharOrNullableChar(rightType)) {
-            return { expression, left, right, context ->
-                val operator = OperatorTable.getBinaryOperator(PsiUtils.getOperationToken(expression))
-                JsBinaryOperation(operator, left, TranslationUtils.charToBoxedChar(context, right))
-            }
-        }
-        return null
-    }
-}
diff --git a/js/js.translator/src/org/jetbrains/kotlin/js/translate/intrinsic/operation/binaryOperationIntrinsics.kt b/js/js.translator/src/org/jetbrains/kotlin/js/translate/intrinsic/operation/binaryOperationIntrinsics.kt
index 9760068b38d..c47acce3faf 100644
--- a/js/js.translator/src/org/jetbrains/kotlin/js/translate/intrinsic/operation/binaryOperationIntrinsics.kt
+++ b/js/js.translator/src/org/jetbrains/kotlin/js/translate/intrinsic/operation/binaryOperationIntrinsics.kt
@@ -52,7 +52,7 @@ class BinaryOperationIntrinsics {
         return computeAndCache(IntrinsicKey(token, descriptor, leftType, rightType))
     }
 
-    private val factories = listOf(CompareToBOIF, EqualsBOIF, AssignmentBOIF)
+    private val factories = listOf(CompareToBOIF, EqualsBOIF)
 
     private fun computeAndCache(key: IntrinsicKey): BinaryOperationIntrinsic? {
         if (key in intrinsicCache) return intrinsicCache[key]