diff --git a/libraries/tools/kotlin-gradle-plugin-api/src/common/kotlin/org/jetbrains/kotlin/gradle/plugin/KotlinTarget.kt b/libraries/tools/kotlin-gradle-plugin-api/src/common/kotlin/org/jetbrains/kotlin/gradle/plugin/KotlinTarget.kt
index 17a0561e728..47a0c2acd28 100644
--- a/libraries/tools/kotlin-gradle-plugin-api/src/common/kotlin/org/jetbrains/kotlin/gradle/plugin/KotlinTarget.kt
+++ b/libraries/tools/kotlin-gradle-plugin-api/src/common/kotlin/org/jetbrains/kotlin/gradle/plugin/KotlinTarget.kt
@@ -21,7 +21,13 @@ import org.jetbrains.kotlin.tooling.core.HasMutableExtras
 interface KotlinTarget : Named, HasAttributes, HasProject, HasMutableExtras {
     val targetName: String
     val disambiguationClassifier: String? get() = targetName
+
+    /* Long deprecation cycle, because IDE might be calling into this via reflection */
+    @Deprecated("Scheduled for removal with Kotlin 2.2")
     val useDisambiguationClassifierAsSourceSetNamePrefix: Boolean
+
+    /* Long deprecation cycle, because IDE might be calling into this via reflection */
+    @Deprecated("Scheduled for removal with Kotlin 2.2")
     val overrideDisambiguationClassifierOnIdeImport: String?
 
     val platformType: KotlinPlatformType
diff --git a/libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/AbstractKotlinTarget.kt b/libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/AbstractKotlinTarget.kt
index 433afe12471..98bb041d3ec 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/AbstractKotlinTarget.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/AbstractKotlinTarget.kt
@@ -44,9 +44,11 @@ abstract class AbstractKotlinTarget(
     override val defaultConfigurationName: String
         get() = disambiguateName("default")
 
+    @Deprecated("Scheduled for removal with Kotlin 2.2")
     override var useDisambiguationClassifierAsSourceSetNamePrefix: Boolean = true
         internal set
 
+    @Deprecated("Scheduled for removal with Kotlin 2.2")
     override var overrideDisambiguationClassifierOnIdeImport: String? = null
         internal set