diff --git a/libraries/stdlib/src/kotlin/properties/Delegation.kt b/libraries/stdlib/src/kotlin/properties/Delegation.kt
index 9398428f9d2..16e3e6792ce 100644
--- a/libraries/stdlib/src/kotlin/properties/Delegation.kt
+++ b/libraries/stdlib/src/kotlin/properties/Delegation.kt
@@ -1,46 +1,5 @@
 package kotlin.properties
 
-/**
- * Base interface that can be used for implementing property delegates of read-only properties. This is provided only for
- * convenience; you don't have to extend this interface as long as your property delegate has methods with the same
- * signatures.
- * @param R the type of object which owns the delegated property.
- * @param T the type of the property value.
- */
-public interface ReadOnlyProperty<in R, out T> {
-    /**
-     * Returns the value of the property for the given object.
-     * @param thisRef the object for which the value is requested.
-     * @param desc the metadata for the property.
-     * @return the property value.
-     */
-    public fun get(thisRef: R, desc: PropertyMetadata): T
-}
-
-/**
- * Base interface that can be used for implementing property delegates of read-only properties. This is provided only for
- * convenience; you don't have to extend this interface as long as your property delegate has methods with the same
- * signatures.
- * @param R the type of object which owns the delegated property.
- * @param T the type of the property value.
- */
-public interface ReadWriteProperty<in R, T> {
-    /**
-     * Returns the value of the property for the given object.
-     * @param thisRef the object for which the value is requested.
-     * @param desc the metadata for the property.
-     * @return the property value.
-     */
-    public fun get(thisRef: R, desc: PropertyMetadata): T
-
-    /**
-     * Sets the value of the property for the given object.
-     * @param thisRef the object for which the value is requested.
-     * @param desc the metadata for the property.
-     * @param value the value to set.
-     */
-    public fun set(thisRef: R, desc: PropertyMetadata, value: T)
-}
 
 /**
  * Standard property delegates.
diff --git a/libraries/stdlib/src/kotlin/properties/Interfaces.kt b/libraries/stdlib/src/kotlin/properties/Interfaces.kt
new file mode 100644
index 00000000000..871a25b7db7
--- /dev/null
+++ b/libraries/stdlib/src/kotlin/properties/Interfaces.kt
@@ -0,0 +1,48 @@
+package kotlin.properties
+
+
+/**
+ * Base interface that can be used for implementing property delegates of read-only properties.
+ *
+ * This is provided only for convenience; you don't have to extend this interface
+ * as long as your property delegate has methods with the same signatures.
+ *
+ * @param R the type of object which owns the delegated property.
+ * @param T the type of the property value.
+ */
+public interface ReadOnlyProperty<in R, out T> {
+    /**
+     * Returns the value of the property for the given object.
+     * @param thisRef the object for which the value is requested.
+     * @param desc the metadata for the property.
+     * @return the property value.
+     */
+    public fun get(thisRef: R, desc: PropertyMetadata): T
+}
+
+/**
+ * Base interface that can be used for implementing property delegates of read-write properties.
+ *
+ * This is provided only for convenience; you don't have to extend this interface
+ * as long as your property delegate has methods with the same signatures.
+ *
+ * @param R the type of object which owns the delegated property.
+ * @param T the type of the property value.
+ */
+public interface ReadWriteProperty<in R, T> {
+    /**
+     * Returns the value of the property for the given object.
+     * @param thisRef the object for which the value is requested.
+     * @param desc the metadata for the property.
+     * @return the property value.
+     */
+    public fun get(thisRef: R, desc: PropertyMetadata): T
+
+    /**
+     * Sets the value of the property for the given object.
+     * @param thisRef the object for which the value is requested.
+     * @param desc the metadata for the property.
+     * @param value the value to set.
+     */
+    public fun set(thisRef: R, desc: PropertyMetadata, value: T)
+}