diff --git a/compiler/frontend/builtins/jet/Boolean.kotlin_class b/compiler/frontend/builtins/jet/Boolean.kotlin_class
index 8b472b4bbd5..48876f24ce9 100644
Binary files a/compiler/frontend/builtins/jet/Boolean.kotlin_class and b/compiler/frontend/builtins/jet/Boolean.kotlin_class differ
diff --git a/compiler/frontend/builtins/jet/Byte.kotlin_class b/compiler/frontend/builtins/jet/Byte.kotlin_class
index b9b56a89c2b..96e16f171d7 100644
Binary files a/compiler/frontend/builtins/jet/Byte.kotlin_class and b/compiler/frontend/builtins/jet/Byte.kotlin_class differ
diff --git a/compiler/frontend/builtins/jet/Char.kotlin_class b/compiler/frontend/builtins/jet/Char.kotlin_class
index d77e9cc4aa7..a3ff15dabad 100644
Binary files a/compiler/frontend/builtins/jet/Char.kotlin_class and b/compiler/frontend/builtins/jet/Char.kotlin_class differ
diff --git a/compiler/frontend/builtins/jet/Double.kotlin_class b/compiler/frontend/builtins/jet/Double.kotlin_class
index 34f9c8fdb66..a8e5be96986 100644
Binary files a/compiler/frontend/builtins/jet/Double.kotlin_class and b/compiler/frontend/builtins/jet/Double.kotlin_class differ
diff --git a/compiler/frontend/builtins/jet/Float.kotlin_class b/compiler/frontend/builtins/jet/Float.kotlin_class
index 8bfc8a34359..98d14ff176f 100644
Binary files a/compiler/frontend/builtins/jet/Float.kotlin_class and b/compiler/frontend/builtins/jet/Float.kotlin_class differ
diff --git a/compiler/frontend/builtins/jet/Int.kotlin_class b/compiler/frontend/builtins/jet/Int.kotlin_class
index ccaeee9b1d1..3805607e7b5 100644
Binary files a/compiler/frontend/builtins/jet/Int.kotlin_class and b/compiler/frontend/builtins/jet/Int.kotlin_class differ
diff --git a/compiler/frontend/builtins/jet/Long.kotlin_class b/compiler/frontend/builtins/jet/Long.kotlin_class
index 9c512a4f466..03202abda2e 100644
Binary files a/compiler/frontend/builtins/jet/Long.kotlin_class and b/compiler/frontend/builtins/jet/Long.kotlin_class differ
diff --git a/compiler/frontend/builtins/jet/Short.kotlin_class b/compiler/frontend/builtins/jet/Short.kotlin_class
index c89f298c2db..d6f9b5f14a2 100644
Binary files a/compiler/frontend/builtins/jet/Short.kotlin_class and b/compiler/frontend/builtins/jet/Short.kotlin_class differ
diff --git a/compiler/testData/builtin-classes.txt b/compiler/testData/builtin-classes.txt
index 35ab534a698..174badbe091 100644
--- a/compiler/testData/builtin-classes.txt
+++ b/compiler/testData/builtin-classes.txt
@@ -54,7 +54,7 @@ public abstract class BooleanIterator : jet.Iterator<jet.Boolean> {
 }
 
 public final class Byte : jet.Number, jet.Comparable<jet.Byte> {
-    /*primary*/ public constructor Byte()
+    /*primary*/ private constructor Byte()
     public open override /*1*/ fun compareTo(/*0*/ other: jet.Byte): jet.Int
     public final fun compareTo(/*0*/ other: jet.Char): jet.Int
     public final fun compareTo(/*0*/ other: jet.Double): jet.Int
@@ -167,7 +167,7 @@ public final class ByteRange : jet.Range<jet.Byte>, jet.Progression<jet.Byte> {
 }
 
 public final class Char : jet.Number, jet.Comparable<jet.Char> {
-    /*primary*/ public constructor Char()
+    /*primary*/ private constructor Char()
     public final fun compareTo(/*0*/ other: jet.Byte): jet.Int
     public open override /*1*/ fun compareTo(/*0*/ other: jet.Char): jet.Int
     public final fun compareTo(/*0*/ other: jet.Double): jet.Int
@@ -291,7 +291,7 @@ public trait Comparable</*0*/ in T> {
 }
 
 public final class Double : jet.Number, jet.Comparable<jet.Double> {
-    /*primary*/ public constructor Double()
+    /*primary*/ private constructor Double()
     public final fun compareTo(/*0*/ other: jet.Byte): jet.Int
     public final fun compareTo(/*0*/ other: jet.Char): jet.Int
     public open override /*1*/ fun compareTo(/*0*/ other: jet.Double): jet.Int
@@ -501,7 +501,7 @@ public trait ExtensionFunction9</*0*/ in T, /*1*/ in P1, /*2*/ in P2, /*3*/ in P
 }
 
 public final class Float : jet.Number, jet.Comparable<jet.Float> {
-    /*primary*/ public constructor Float()
+    /*primary*/ private constructor Float()
     public final fun compareTo(/*0*/ other: jet.Byte): jet.Int
     public final fun compareTo(/*0*/ other: jet.Char): jet.Int
     public final fun compareTo(/*0*/ other: jet.Double): jet.Int
@@ -711,7 +711,7 @@ public trait Hashable {
 }
 
 public final class Int : jet.Number, jet.Comparable<jet.Int> {
-    /*primary*/ public constructor Int()
+    /*primary*/ private constructor Int()
     public final fun and(/*0*/ other: jet.Int): jet.Int
     public final fun compareTo(/*0*/ other: jet.Byte): jet.Int
     public final fun compareTo(/*0*/ other: jet.Char): jet.Int
@@ -1141,7 +1141,7 @@ public trait ListIterator</*0*/ out T> : jet.Iterator<T> {
 }
 
 public final class Long : jet.Number, jet.Comparable<jet.Long> {
-    /*primary*/ public constructor Long()
+    /*primary*/ private constructor Long()
     public final fun and(/*0*/ other: jet.Long): jet.Long
     public final fun compareTo(/*0*/ other: jet.Byte): jet.Int
     public final fun compareTo(/*0*/ other: jet.Char): jet.Int
@@ -1438,7 +1438,7 @@ public trait Set</*0*/ out E> : jet.Collection<E> {
 }
 
 public final class Short : jet.Number, jet.Comparable<jet.Short> {
-    /*primary*/ public constructor Short()
+    /*primary*/ private constructor Short()
     public final fun compareTo(/*0*/ other: jet.Byte): jet.Int
     public final fun compareTo(/*0*/ other: jet.Char): jet.Int
     public final fun compareTo(/*0*/ other: jet.Double): jet.Int
diff --git a/compiler/testData/diagnostics/tests/ConstructorsOfPrimitives.kt b/compiler/testData/diagnostics/tests/ConstructorsOfPrimitives.kt
new file mode 100644
index 00000000000..adfb57f794b
--- /dev/null
+++ b/compiler/testData/diagnostics/tests/ConstructorsOfPrimitives.kt
@@ -0,0 +1,10 @@
+fun test() {
+    <!INVISIBLE_MEMBER!>Double<!>()
+    <!INVISIBLE_MEMBER!>Float<!>()
+    <!INVISIBLE_MEMBER!>Long<!>()
+    <!INVISIBLE_MEMBER!>Int<!>()
+    <!INVISIBLE_MEMBER!>Short<!>()
+    <!INVISIBLE_MEMBER!>Byte<!>()
+    <!INVISIBLE_MEMBER!>Char<!>()
+    <!INVISIBLE_MEMBER!>Boolean<!>()
+}
\ No newline at end of file
diff --git a/compiler/tests/org/jetbrains/jet/checkers/JetDiagnosticsTestGenerated.java b/compiler/tests/org/jetbrains/jet/checkers/JetDiagnosticsTestGenerated.java
index cc4183dce25..b222706d282 100644
--- a/compiler/tests/org/jetbrains/jet/checkers/JetDiagnosticsTestGenerated.java
+++ b/compiler/tests/org/jetbrains/jet/checkers/JetDiagnosticsTestGenerated.java
@@ -134,6 +134,11 @@ public class JetDiagnosticsTestGenerated extends AbstractDiagnosticsTestWithEage
             doTest("compiler/testData/diagnostics/tests/Constructors.kt");
         }
         
+        @TestMetadata("ConstructorsOfPrimitives.kt")
+        public void testConstructorsOfPrimitives() throws Exception {
+            doTest("compiler/testData/diagnostics/tests/ConstructorsOfPrimitives.kt");
+        }
+        
         @TestMetadata("CovariantOverrideType.kt")
         public void testCovariantOverrideType() throws Exception {
             doTest("compiler/testData/diagnostics/tests/CovariantOverrideType.kt");
diff --git a/idea/builtinsSrc/jet/Library.kt b/idea/builtinsSrc/jet/Library.kt
index fe19c3f8db0..2050b98dba6 100644
--- a/idea/builtinsSrc/jet/Library.kt
+++ b/idea/builtinsSrc/jet/Library.kt
@@ -29,7 +29,7 @@ public trait Hashable {
   public fun equals(other : Any?) : Boolean
 }
 
-public class Boolean {
+public class Boolean private () {
   public fun not() : Boolean
 
   public fun and(other : Boolean) : Boolean
diff --git a/idea/builtinsSrc/jet/Numbers.kt b/idea/builtinsSrc/jet/Numbers.kt
index 728d49f64d9..52ddf64bc8d 100644
--- a/idea/builtinsSrc/jet/Numbers.kt
+++ b/idea/builtinsSrc/jet/Numbers.kt
@@ -17,7 +17,7 @@ public abstract class Number : Hashable {
 //  fun equals(other : Char) : Boolean
 }
 
-public class Double : Number, Comparable<Double>  {
+public class Double private () : Number, Comparable<Double>  {
   public override fun compareTo(other : Double)  : Int
   public fun compareTo(other : Float)  : Int
   public fun compareTo(other : Long)   : Int
@@ -90,7 +90,7 @@ public class Double : Number, Comparable<Double>  {
   public override fun equals(other : Any?) : Boolean
 }
 
-public class Float : Number, Comparable<Float>  {
+public class Float private () : Number, Comparable<Float>  {
   public fun compareTo(other : Double) : Int
   public override fun compareTo(other : Float) : Int
   public fun compareTo(other : Long)   : Int
@@ -164,7 +164,7 @@ public class Float : Number, Comparable<Float>  {
   public override fun equals(other : Any?) : Boolean
 }
 
-public class Long : Number, Comparable<Long> {
+public class Long private () : Number, Comparable<Long> {
   public fun compareTo(other : Double) : Int
   public fun compareTo(other : Float)  : Int
   public override fun compareTo(other : Long)   : Int
@@ -246,7 +246,7 @@ public class Long : Number, Comparable<Long> {
   public override fun equals(other : Any?) : Boolean
 }
 
-public class Int : Number, Comparable<Int> {
+public class Int private () : Number, Comparable<Int> {
   public fun compareTo(other : Double) : Int
   public fun compareTo(other : Float)  : Int
   public fun compareTo(other : Long)   : Int
@@ -328,7 +328,7 @@ public class Int : Number, Comparable<Int> {
   public override fun equals(other : Any?) : Boolean
 }
 
-public class Char : Number, Comparable<Char> {
+public class Char private () : Number, Comparable<Char> {
   public fun compareTo(other : Double) : Int
   public fun compareTo(other : Float)  : Int
   public fun compareTo(other : Long)    : Int
@@ -396,7 +396,7 @@ public class Char : Number, Comparable<Char> {
   public override fun equals(other : Any?) : Boolean
 }
 
-public class Short : Number, Comparable<Short> {
+public class Short private () : Number, Comparable<Short> {
   public fun compareTo(other : Double) : Int
   public fun compareTo(other : Float)  : Int
   public fun compareTo(other : Long)    : Int
@@ -470,7 +470,7 @@ public class Short : Number, Comparable<Short> {
   public override fun equals(other : Any?) : Boolean
 }
 
-public class Byte : Number, Comparable<Byte> {
+public class Byte private () : Number, Comparable<Byte> {
   public fun compareTo(other : Double) : Int
   public fun compareTo(other : Float)  : Int
   public fun compareTo(other : Long)    : Int