diff --git a/j2k/src/org/jetbrains/jet/j2k/ast/File.kt b/j2k/src/org/jetbrains/jet/j2k/ast/File.kt
index bb86687a7bf..367e984bbc7 100644
--- a/j2k/src/org/jetbrains/jet/j2k/ast/File.kt
+++ b/j2k/src/org/jetbrains/jet/j2k/ast/File.kt
@@ -29,7 +29,7 @@ class File(val elements: List<Element>, val mainFunction: String?) : Element() {
     override fun generateCode(builder: CodeBuilder) {
         builder.append(elements, "\n")
         if (mainFunction != null) {
-            builder.append(mainFunction)
+            builder append "\n\n" append mainFunction
         }
     }
 }
diff --git a/j2k/tests/testData/ast/function/main2.kt b/j2k/tests/testData/ast/function/main2.kt
index e8db5f60a82..b24558d2327 100644
--- a/j2k/tests/testData/ast/function/main2.kt
+++ b/j2k/tests/testData/ast/function/main2.kt
@@ -4,4 +4,5 @@ public class A {
         }
     }
 }
+
 fun main(args: Array<String>) = A.main(args)
\ No newline at end of file
diff --git a/j2k/tests/testData/ast/function/mainAndNullabilitySetting.kt b/j2k/tests/testData/ast/function/mainAndNullabilitySetting.kt
index 39bef204e6b..2c9cc41c60c 100644
--- a/j2k/tests/testData/ast/function/mainAndNullabilitySetting.kt
+++ b/j2k/tests/testData/ast/function/mainAndNullabilitySetting.kt
@@ -5,4 +5,5 @@ public class A {
         }
     }
 }
+
 fun main(args: Array<String>) = A.main(args)
\ No newline at end of file
diff --git a/j2k/tests/testData/ast/issues/kt-638.kt b/j2k/tests/testData/ast/issues/kt-638.kt
index 4423bbd03f7..d89c6c6a2a1 100644
--- a/j2k/tests/testData/ast/issues/kt-638.kt
+++ b/j2k/tests/testData/ast/issues/kt-638.kt
@@ -31,4 +31,5 @@ public class User {
         }
     }
 }
+
 fun main(args: Array<String>) = User.main(args)
\ No newline at end of file
diff --git a/j2k/tests/testData/ast/issues/kt-871.kt b/j2k/tests/testData/ast/issues/kt-871.kt
index 742b143033b..3afd63a22dc 100644
--- a/j2k/tests/testData/ast/issues/kt-871.kt
+++ b/j2k/tests/testData/ast/issues/kt-871.kt
@@ -7,4 +7,5 @@ class Program {
         }
     }
 }
+
 fun main(args: Array<String>) = Program.main(args)
\ No newline at end of file
diff --git a/j2k/tests/testData/ast/switch/comlicatedFallDown.kt b/j2k/tests/testData/ast/switch/comlicatedFallDown.kt
index 539e559599b..bf2ab743683 100644
--- a/j2k/tests/testData/ast/switch/comlicatedFallDown.kt
+++ b/j2k/tests/testData/ast/switch/comlicatedFallDown.kt
@@ -83,4 +83,5 @@ public class SwitchDemo {
         }
     }
 }
+
 fun main(args: Array<String>) = SwitchDemo.main(args)
\ No newline at end of file
diff --git a/j2k/tests/testData/ast/switch/emptySwitch.kt b/j2k/tests/testData/ast/switch/emptySwitch.kt
index c6a174a6a0c..800aa2d80de 100644
--- a/j2k/tests/testData/ast/switch/emptySwitch.kt
+++ b/j2k/tests/testData/ast/switch/emptySwitch.kt
@@ -11,4 +11,5 @@ public class NonDefault {
         }
     }
 }
+
 fun main(args: Array<String>) = NonDefault.main(args)
\ No newline at end of file
diff --git a/j2k/tests/testData/ast/switch/fallDown.kt b/j2k/tests/testData/ast/switch/fallDown.kt
index ca70bca2f2a..6929b609e8e 100644
--- a/j2k/tests/testData/ast/switch/fallDown.kt
+++ b/j2k/tests/testData/ast/switch/fallDown.kt
@@ -13,4 +13,5 @@ public class SwitchDemo {
         }
     }
 }
+
 fun main(args: Array<String>) = SwitchDemo.main(args)
\ No newline at end of file
diff --git a/j2k/tests/testData/ast/switch/fallDownWithBlocks.kt b/j2k/tests/testData/ast/switch/fallDownWithBlocks.kt
index 3bbd64c6a93..7beb1782fa3 100644
--- a/j2k/tests/testData/ast/switch/fallDownWithBlocks.kt
+++ b/j2k/tests/testData/ast/switch/fallDownWithBlocks.kt
@@ -21,4 +21,5 @@ public class C {
         }
     }
 }
+
 fun main(args: Array<String>) = C.main(args)
\ No newline at end of file
diff --git a/j2k/tests/testData/ast/switch/kt-539.kt b/j2k/tests/testData/ast/switch/kt-539.kt
index 6c29952d18b..3cc798a0e52 100644
--- a/j2k/tests/testData/ast/switch/kt-539.kt
+++ b/j2k/tests/testData/ast/switch/kt-539.kt
@@ -25,4 +25,5 @@ public class SwitchDemo {
         }
     }
 }
+
 fun main(args: Array<String>) = SwitchDemo.main(args)
\ No newline at end of file
diff --git a/j2k/tests/testData/ast/switch/nondefault.kt b/j2k/tests/testData/ast/switch/nondefault.kt
index 80ac26c286f..843c744739d 100644
--- a/j2k/tests/testData/ast/switch/nondefault.kt
+++ b/j2k/tests/testData/ast/switch/nondefault.kt
@@ -13,4 +13,5 @@ public class NonDefault {
         }
     }
 }
+
 fun main(args: Array<String>) = NonDefault.main(args)
\ No newline at end of file