diff --git a/libraries/stdlib/jvm/src/kotlin/internal/PlatformImplementations.kt b/libraries/stdlib/jvm/src/kotlin/internal/PlatformImplementations.kt
index 4e180e040bd..5679f905a27 100644
--- a/libraries/stdlib/jvm/src/kotlin/internal/PlatformImplementations.kt
+++ b/libraries/stdlib/jvm/src/kotlin/internal/PlatformImplementations.kt
@@ -25,25 +25,36 @@ internal val IMPLEMENTATIONS: PlatformImplementations = run {
     val version = getJavaVersion()
     if (version >= 0x10008) {
         try {
-            return@run Class.forName("kotlin.internal.jdk8.JDK8PlatformImplementations").newInstance() as PlatformImplementations
+            return@run castToBaseType<PlatformImplementations>(Class.forName("kotlin.internal.jdk8.JDK8PlatformImplementations").newInstance())
         } catch (e: ClassNotFoundException) { }
         try {
-            return@run Class.forName("kotlin.internal.JRE8PlatformImplementations").newInstance() as PlatformImplementations
+            return@run castToBaseType<PlatformImplementations>(Class.forName("kotlin.internal.JRE8PlatformImplementations").newInstance())
         } catch (e: ClassNotFoundException) { }
     }
 
     if (version >= 0x10007) {
         try {
-            return@run Class.forName("kotlin.internal.jdk7.JDK7PlatformImplementations").newInstance() as PlatformImplementations
+            return@run castToBaseType<PlatformImplementations>(Class.forName("kotlin.internal.jdk7.JDK7PlatformImplementations").newInstance())
         } catch (e: ClassNotFoundException) { }
         try {
-            return@run Class.forName("kotlin.internal.JRE7PlatformImplementations").newInstance() as PlatformImplementations
+            return@run castToBaseType<PlatformImplementations>(Class.forName("kotlin.internal.JRE7PlatformImplementations").newInstance())
         } catch (e: ClassNotFoundException) { }
     }
 
     PlatformImplementations()
 }
 
+@kotlin.internal.InlineOnly
+private inline fun <reified T : Any> castToBaseType(instance: Any): T {
+    try {
+        return instance as T
+    } catch (e: ClassCastException) {
+        val instanceCL = instance.javaClass.classLoader
+        val baseTypeCL = T::class.java.classLoader
+        throw ClassCastException("Instance classloader: $instanceCL, base type classloader: $baseTypeCL").initCause(e)
+    }
+}
+
 private fun getJavaVersion(): Int {
     val default = 0x10006
     val version = System.getProperty("java.specification.version") ?: return default