diff --git a/grammar/src/control.grm b/grammar/src/control.grm
index 89ea3d6ee54..66091a81b97 100644
--- a/grammar/src/control.grm
+++ b/grammar/src/control.grm
@@ -1,5 +1,5 @@
 /**
-h3. Control structures
+h2. Control structures
 
 bq. See [Control structures]
 */
diff --git a/idea/src/jet/Library.jet b/idea/src/jet/Library.jet
index 2f4673a74d7..04df29fc7ae 100644
--- a/idea/src/jet/Library.jet
+++ b/idea/src/jet/Library.jet
@@ -7,6 +7,30 @@ namespace typeinfo {
     }
 }
 
+namespace io {
+  fun print(message : Any?)
+  fun print(message : Int)
+  fun print(message : Long)
+  fun print(message : Byte)
+  fun print(message : Short)
+  fun print(message : Char)
+  fun print(message : Boolean)
+  fun print(message : Float)
+  fun print(message : Double)
+
+  fun println(message : Any?)
+  fun println(message : Int)
+  fun println(message : Long)
+  fun println(message : Byte)
+  fun println(message : Short)
+  fun println(message : Char)
+  fun println(message : Boolean)
+  fun println(message : Float)
+  fun println(message : Double)
+
+  fun readLine() : String?
+}
+
 // Can't write a body due to a bootstrapping problem (see JET-74)
 fun Any?.equals(other : Any?) : Boolean// = this === other