diff --git a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/KotlinJsCompilation.kt b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/KotlinJsCompilation.kt
index 2c2361de6cf..b32e03fde30 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/KotlinJsCompilation.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/KotlinJsCompilation.kt
@@ -9,8 +9,10 @@
 package org.jetbrains.kotlin.gradle.plugin.mpp
 
 import org.jetbrains.kotlin.gradle.dsl.KotlinJsOptions
+import org.jetbrains.kotlin.gradle.plugin.JsCompilerType
 import org.jetbrains.kotlin.gradle.plugin.KotlinCompilationWithResources
 import org.jetbrains.kotlin.gradle.plugin.KotlinTarget
+import org.jetbrains.kotlin.gradle.targets.js.KotlinJsTarget
 import org.jetbrains.kotlin.gradle.targets.js.npm.PackageJson
 import org.jetbrains.kotlin.gradle.tasks.Kotlin2JsCompile
 import org.jetbrains.kotlin.gradle.utils.lowerCamelCaseName
@@ -34,7 +36,9 @@ open class KotlinJsCompilation(
 
     override val defaultSourceSetName: String
         get() = lowerCamelCaseName(
-            target.disambiguationClassifier?.removePrefix(LEGACY_DISAMBIGUATION_CLASSIFIER),
+            (target as KotlinJsTarget).irTarget?.let {
+                target.disambiguationClassifier?.removeSuffix(JsCompilerType.legacy.name.capitalize())
+            } ?: target.disambiguationClassifier,
             compilationName
         )
 }
\ No newline at end of file
diff --git a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/KotlinJsPlugin.kt b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/KotlinJsPlugin.kt
index 50743840687..278ae6094c4 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/KotlinJsPlugin.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/KotlinJsPlugin.kt
@@ -10,10 +10,12 @@ import org.gradle.api.Project
 import org.gradle.api.plugins.JavaBasePlugin
 import org.jetbrains.kotlin.gradle.dsl.KotlinJsProjectExtension
 import org.jetbrains.kotlin.gradle.dsl.kotlinExtension
+import org.jetbrains.kotlin.gradle.plugin.JsCompilerType
 import org.jetbrains.kotlin.gradle.plugin.configureDefaultVersionsResolutionStrategy
 import org.jetbrains.kotlin.gradle.plugin.mpp.KotlinJsSingleTargetPreset
 import org.jetbrains.kotlin.gradle.targets.js.ir.KotlinJsIrSingleTargetPreset
 import org.jetbrains.kotlin.gradle.utils.checkGradleCompatibility
+import org.jetbrains.kotlin.gradle.utils.lowerCamelCaseName
 
 open class KotlinJsPlugin(
     private val kotlinPluginVersion: String,
@@ -35,7 +37,13 @@ open class KotlinJsPlugin(
             KotlinJsIrSingleTargetPreset(project, kotlinPluginVersion, mixedMode)
         else null
 
-        val target = KotlinJsSingleTargetPreset(project, kotlinPluginVersion, irPreset).createTarget("Js")
+        val target = KotlinJsSingleTargetPreset(project, kotlinPluginVersion, irPreset)
+            .createTarget(
+                lowerCamelCaseName(
+                    "js",
+                    irPreset?.let { JsCompilerType.legacy.name }
+                )
+            )
 
         kotlinExtension.target = target
 
diff --git a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/KotlinJsTargetPreset.kt b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/KotlinJsTargetPreset.kt
index 8e6e8ed6f42..02eba248b7d 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/KotlinJsTargetPreset.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/KotlinJsTargetPreset.kt
@@ -13,7 +13,6 @@ import org.jetbrains.kotlin.gradle.plugin.JsCompilerType
 import org.jetbrains.kotlin.gradle.plugin.KotlinPlatformType
 import org.jetbrains.kotlin.gradle.targets.js.KotlinJsTarget
 import org.jetbrains.kotlin.gradle.targets.js.KotlinJsTargetConfigurator
-import org.jetbrains.kotlin.gradle.targets.js.ir.IR_TARGET_SUFFIX
 import org.jetbrains.kotlin.gradle.targets.js.ir.KotlinJsIrSingleTargetPreset
 import org.jetbrains.kotlin.gradle.targets.js.ir.KotlinJsIrTargetPreset
 import org.jetbrains.kotlin.gradle.utils.lowerCamelCaseName
@@ -35,18 +34,12 @@ open class KotlinJsTargetPreset(
             project,
             platformType
         ).apply {
-            this.irTarget = irPreset?.createTarget("$name$IR_TARGET_SUFFIX")
+            this.irTarget = irPreset?.createTarget(
+                lowerCamelCaseName(name.removeSuffix(JsCompilerType.legacy.name.capitalize()), JsCompilerType.ir.name)
+            )
         }
     }
 
-    override fun provideTargetDisambiguationClassifier(target: KotlinOnlyTarget<KotlinJsCompilation>): String? =
-        if (irPreset == null) {
-            super.provideTargetDisambiguationClassifier(target)
-        } else {
-            LEGACY_DISAMBIGUATION_CLASSIFIER +
-                    super.provideTargetDisambiguationClassifier(target)
-        }
-
     override fun createKotlinTargetConfigurator() = KotlinJsTargetConfigurator(
         kotlinPluginVersion
     )
@@ -79,11 +72,9 @@ class KotlinJsSingleTargetPreset(
 
     // In a Kotlin/JS single-platform project, we don't need any disambiguation suffixes or prefixes in the names:
     override fun provideTargetDisambiguationClassifier(target: KotlinOnlyTarget<KotlinJsCompilation>): String? =
-        irPreset?.let { LEGACY_DISAMBIGUATION_CLASSIFIER }
+        null
 
     override fun createKotlinTargetConfigurator() = KotlinJsTargetConfigurator(
         kotlinPluginVersion
     )
-}
-
-const val LEGACY_DISAMBIGUATION_CLASSIFIER = "legacy"
\ No newline at end of file
+}
\ No newline at end of file
diff --git a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/ir/KotlinJsIrCompilation.kt b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/ir/KotlinJsIrCompilation.kt
index 8a02ee0949e..07318ed272b 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/ir/KotlinJsIrCompilation.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/ir/KotlinJsIrCompilation.kt
@@ -5,9 +5,9 @@
 
 package org.jetbrains.kotlin.gradle.targets.js.ir
 
-import org.gradle.api.Task
 import org.gradle.api.file.SourceDirectorySet
 import org.gradle.api.tasks.TaskProvider
+import org.jetbrains.kotlin.gradle.plugin.JsCompilerType
 import org.jetbrains.kotlin.gradle.plugin.KotlinCompilation
 import org.jetbrains.kotlin.gradle.plugin.KotlinSourceSet
 import org.jetbrains.kotlin.gradle.plugin.KotlinTarget
@@ -51,7 +51,7 @@ class KotlinJsIrCompilation(
             return lowerCamelCaseName(
                 if ((target as KotlinJsIrTarget).mixedMode)
                     target.disambiguationClassifier
-                        ?.removeSuffix(IR_TARGET_SUFFIX)
+                        ?.removeSuffix(JsCompilerType.ir.name.capitalize())
                 else
                     target.disambiguationClassifier,
                 compilationName
diff --git a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/ir/KotlinJsIrTargetPreset.kt b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/ir/KotlinJsIrTargetPreset.kt
index fa1d6d241bf..805b4e79834 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/ir/KotlinJsIrTargetPreset.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/ir/KotlinJsIrTargetPreset.kt
@@ -60,6 +60,4 @@ class KotlinJsIrSingleTargetPreset(
 
     override fun createKotlinTargetConfigurator(): KotlinOnlyTargetConfigurator<KotlinJsIrCompilation, KotlinJsIrTarget> =
         KotlinJsIrTargetConfigurator(kotlinPluginVersion)
-}
-
-const val IR_TARGET_SUFFIX = "Ir"
\ No newline at end of file
+}
\ No newline at end of file