diff --git a/compiler/frontend/src/jet/Ranges.jet b/compiler/frontend/src/jet/Ranges.jet
index 5ff54b14f7d..516ad722bfb 100644
--- a/compiler/frontend/src/jet/Ranges.jet
+++ b/compiler/frontend/src/jet/Ranges.jet
@@ -1,10 +1,12 @@
 package jet
 
 public trait Range<in T : Comparable<T>> {
-  public fun contains(item : T) : Boolean
+    public val start: T
+    public val end: T
+    public fun contains(item : T) : Boolean
 }
 
-public class IntRange(public val start : Int, public val end : Int) : Range<Int>, IntIterable {
+public class IntRange(public override val start : Int, public override val end : Int) : Range<Int>, IntIterable {
     public override fun iterator () : IntIterator
 
     public override fun contains (elem: Int) : Boolean
@@ -14,7 +16,7 @@ public class IntRange(public val start : Int, public val end : Int) : Range<Int>
     }
 }
 
-public class LongRange(public val start : Long, public val end : Long) : Range<Long>, LongIterable {
+public class LongRange(public override val start : Long, public override val end : Long) : Range<Long>, LongIterable {
     public override fun iterator () : LongIterator
 
     public override fun contains (elem: Long) : Boolean
@@ -24,7 +26,7 @@ public class LongRange(public val start : Long, public val end : Long) : Range<L
     }
 }
 
-public class ByteRange(public val start : Byte, public val end : Byte) : Range<Byte>, ByteIterable {
+public class ByteRange(public override val start : Byte, public override val end : Byte) : Range<Byte>, ByteIterable {
     public override fun iterator () : ByteIterator
 
     public override fun contains (elem: Byte) : Boolean
@@ -34,7 +36,7 @@ public class ByteRange(public val start : Byte, public val end : Byte) : Range<B
     }
 }
 
-public class ShortRange(public val start : Short, public val end : Short) : Range<Short>, ShortIterable {
+public class ShortRange(public override val start : Short, public override val end : Short) : Range<Short>, ShortIterable {
     public override fun iterator () : ShortIterator
 
     public override fun contains (elem: Short) : Boolean
@@ -44,7 +46,7 @@ public class ShortRange(public val start : Short, public val end : Short) : Rang
     }
 }
 
-public class CharRange(public val start : Char, public val end : Char) : Range<Char>, CharIterable {
+public class CharRange(public override val start : Char, public override val end : Char) : Range<Char>, CharIterable {
     public override fun iterator () : CharIterator
 
     public override fun contains (elem: Char) : Boolean
@@ -54,7 +56,7 @@ public class CharRange(public val start : Char, public val end : Char) : Range<C
     }
 }
 
-public class FloatRange(public val start : Float, public val end : Float) : Range<Float> {
+public class FloatRange(public override val start : Float, public override val end : Float) : Range<Float> {
     public override fun contains (elem: Float) : Boolean
 
     public class object {
@@ -62,7 +64,7 @@ public class FloatRange(public val start : Float, public val end : Float) : Rang
     }
 }
 
-public class DoubleRange(public val start : Double, public val end : Double) : Range<Double> {
+public class DoubleRange(public override val start : Double, public override val end : Double) : Range<Double> {
     public override fun contains (elem: Double) : Boolean
 
     public class object {
diff --git a/compiler/testData/codegen/box/controlStructures/kt299.kt b/compiler/testData/codegen/box/controlStructures/kt299.kt
index eaf27e80197..677ca49025a 100644
--- a/compiler/testData/codegen/box/controlStructures/kt299.kt
+++ b/compiler/testData/codegen/box/controlStructures/kt299.kt
@@ -1,4 +1,8 @@
 class MyRange1() : Range<Int> {
+    override val start: Int
+        get() = 0
+    override val end: Int
+        get() = 0
     override fun contains(item: Int) = true
 }
 
diff --git a/runtime/src/jet/ByteRange.java b/runtime/src/jet/ByteRange.java
index 068e2959b7c..6b75f0fb143 100644
--- a/runtime/src/jet/ByteRange.java
+++ b/runtime/src/jet/ByteRange.java
@@ -64,11 +64,13 @@ public final class ByteRange implements Range<Byte>, ByteIterable {
         return result;
     }
 
-    public byte getStart() {
+    @Override
+    public Byte getStart() {
         return start;
     }
 
-    public byte getEnd() {
+    @Override
+    public Byte getEnd() {
         return end;
     }
 
diff --git a/runtime/src/jet/CharRange.java b/runtime/src/jet/CharRange.java
index 935782ea7cf..e92f1f760df 100644
--- a/runtime/src/jet/CharRange.java
+++ b/runtime/src/jet/CharRange.java
@@ -64,11 +64,13 @@ public final class CharRange implements Range<Character>, CharIterable {
         return result;
     }
 
-    public char getStart() {
+    @Override
+    public Character getStart() {
         return start;
     }
 
-    public char getEnd() {
+    @Override
+    public Character getEnd() {
         return end;
     }
 
diff --git a/runtime/src/jet/DoubleRange.java b/runtime/src/jet/DoubleRange.java
index b430cd9bcf6..75ed2328c79 100644
--- a/runtime/src/jet/DoubleRange.java
+++ b/runtime/src/jet/DoubleRange.java
@@ -65,11 +65,13 @@ public final class DoubleRange implements Range<Double> {
         return result;
     }
 
-    public double getStart() {
+    @Override
+    public Double getStart() {
         return start;
     }
 
-    public double  getEnd() {
+    @Override
+    public Double getEnd() {
         return end;
     }
 }
diff --git a/runtime/src/jet/FloatRange.java b/runtime/src/jet/FloatRange.java
index 0f0be3babed..d803f307737 100644
--- a/runtime/src/jet/FloatRange.java
+++ b/runtime/src/jet/FloatRange.java
@@ -61,11 +61,13 @@ public final class FloatRange implements Range<Float> {
         return result;
     }
 
-    public float getStart() {
+    @Override
+    public Float getStart() {
         return start;
     }
 
-    public float getEnd() {
+    @Override
+    public Float getEnd() {
         return end;
     }
 }
diff --git a/runtime/src/jet/IntRange.java b/runtime/src/jet/IntRange.java
index 13a945a4969..dd4c9470e67 100644
--- a/runtime/src/jet/IntRange.java
+++ b/runtime/src/jet/IntRange.java
@@ -64,11 +64,13 @@ public final class IntRange implements Range<Integer>, IntIterable {
         return result;
     }
 
-    public int getStart() {
+    @Override
+    public Integer getStart() {
         return start;
     }
 
-    public int getEnd() {
+    @Override
+    public Integer getEnd() {
         return end;
     }
 
diff --git a/runtime/src/jet/LongRange.java b/runtime/src/jet/LongRange.java
index ce671c04ef8..d52e048c513 100644
--- a/runtime/src/jet/LongRange.java
+++ b/runtime/src/jet/LongRange.java
@@ -64,11 +64,13 @@ public final class LongRange implements Range<Long>, LongIterable {
         return result;
     }
 
-    public long getStart() {
+    @Override
+    public Long getStart() {
         return start;
     }
 
-    public long getEnd() {
+    @Override
+    public Long getEnd() {
         return end;
     }
 
diff --git a/runtime/src/jet/Range.java b/runtime/src/jet/Range.java
index 8dec9130b06..863540d8da5 100644
--- a/runtime/src/jet/Range.java
+++ b/runtime/src/jet/Range.java
@@ -20,5 +20,7 @@ import org.jetbrains.jet.rt.annotation.AssertInvisibleInResolver;
 
 @AssertInvisibleInResolver
 public interface Range<T extends Comparable<T>> {
+    T getStart();
+    T getEnd();
     boolean contains(T item);
 }
diff --git a/runtime/src/jet/ShortRange.java b/runtime/src/jet/ShortRange.java
index 6ecc2f5c810..e634f70665a 100644
--- a/runtime/src/jet/ShortRange.java
+++ b/runtime/src/jet/ShortRange.java
@@ -64,11 +64,13 @@ public final class ShortRange implements Range<Short>, ShortIterable {
         return result;
     }
 
-    public short getStart() {
+    @Override
+    public Short getStart() {
         return start;
     }
 
-    public short getEnd() {
+    @Override
+    public Short getEnd() {
         return end;
     }