diff --git a/src/org/jetbrains/jet/j2k/Converter.kt b/src/org/jetbrains/jet/j2k/Converter.kt
index 4a41f02cf2c..234a1e76247 100644
--- a/src/org/jetbrains/jet/j2k/Converter.kt
+++ b/src/org/jetbrains/jet/j2k/Converter.kt
@@ -418,10 +418,10 @@ public open class Converter() {
         return parameters.map { parameterToParameter(it!!) }
     }
 
-    public open fun parameterToParameter(parameter: PsiParameter): Parameter {
+    public open fun parameterToParameter(parameter: PsiParameter, forceNotNull: Boolean = false): Parameter {
         return Parameter(Identifier(parameter.getName()!!),
                 typeToType(parameter.getType(),
-                        isAnnotatedAsNotNull(parameter.getModifierList())), true)
+                        forceNotNull || isAnnotatedAsNotNull(parameter.getModifierList())), true)
     }
 
     public open fun argumentsToExpressionList(expression: PsiCallExpression): List<Expression> {
diff --git a/src/org/jetbrains/jet/j2k/visitors/StatementVisitor.kt b/src/org/jetbrains/jet/j2k/visitors/StatementVisitor.kt
index afc4bd9aaed..a8ab7803d01 100644
--- a/src/org/jetbrains/jet/j2k/visitors/StatementVisitor.kt
+++ b/src/org/jetbrains/jet/j2k/visitors/StatementVisitor.kt
@@ -188,7 +188,7 @@ public open class StatementVisitor(converter: Converter): ElementVisitor(convert
         val catchBlocks = statement?.getCatchBlocks()!!
         val catchBlockParameters = statement?.getCatchBlockParameters()!!
         for (i in 0..catchBlocks.size - 1) {
-            catches.add(CatchStatement(getConverter().parameterToParameter(catchBlockParameters[i]!!),
+            catches.add(CatchStatement(getConverter().parameterToParameter(catchBlockParameters[i]!!, true),
                     getConverter().blockToBlock(catchBlocks[i], true)))
         }
         myResult = TryStatement(getConverter().blockToBlock(statement?.getTryBlock(), true),
diff --git a/tests/testData/ast/tryStatement/statement/commonCaseForTryStatement.kt b/tests/testData/ast/tryStatement/statement/commonCaseForTryStatement.kt
index f76a797ebda..97e0efb08e3 100644
--- a/tests/testData/ast/tryStatement/statement/commonCaseForTryStatement.kt
+++ b/tests/testData/ast/tryStatement/statement/commonCaseForTryStatement.kt
@@ -2,10 +2,10 @@ try
 {
 callMethod(params)
 }
-catch (e : Exception?) {
+catch (e : Exception) {
 println(1)
 }
-catch (e : IOException?) {
+catch (e : IOException) {
 println(0)
 }
 finally
diff --git a/tests/testData/ast/tryStatement/statement/emptyTryWithTwoCatchesWithEmptyFinally.kt b/tests/testData/ast/tryStatement/statement/emptyTryWithTwoCatchesWithEmptyFinally.kt
index 5415a28f50f..da8e67915a0 100644
--- a/tests/testData/ast/tryStatement/statement/emptyTryWithTwoCatchesWithEmptyFinally.kt
+++ b/tests/testData/ast/tryStatement/statement/emptyTryWithTwoCatchesWithEmptyFinally.kt
@@ -1,10 +1,10 @@
 try
 {
 }
-catch (e : Exception?) {
+catch (e : Exception) {
 println(1)
 }
-catch (e : IOException?) {
+catch (e : IOException) {
 println(0)
 }
 finally
diff --git a/tests/testData/ast/tryStatement/statement/emptyTryWithTwoCatchesWithFinally.kt b/tests/testData/ast/tryStatement/statement/emptyTryWithTwoCatchesWithFinally.kt
index 4da4b18ca9a..bf23b61c5d5 100644
--- a/tests/testData/ast/tryStatement/statement/emptyTryWithTwoCatchesWithFinally.kt
+++ b/tests/testData/ast/tryStatement/statement/emptyTryWithTwoCatchesWithFinally.kt
@@ -1,10 +1,10 @@
 try
 {
 }
-catch (e : Exception?) {
+catch (e : Exception) {
 println(1)
 }
-catch (e : IOException?) {
+catch (e : IOException) {
 println(0)
 }
 finally
diff --git a/tests/testData/ast/tryStatement/statement/emptyTryWithTwoCatchesWithoutFinally.kt b/tests/testData/ast/tryStatement/statement/emptyTryWithTwoCatchesWithoutFinally.kt
index 04545c66873..9d98b8278e1 100644
--- a/tests/testData/ast/tryStatement/statement/emptyTryWithTwoCatchesWithoutFinally.kt
+++ b/tests/testData/ast/tryStatement/statement/emptyTryWithTwoCatchesWithoutFinally.kt
@@ -1,9 +1,9 @@
 try
 {
 }
-catch (e : Exception?) {
+catch (e : Exception) {
 println(1)
 }
-catch (e : IOException?) {
+catch (e : IOException) {
 println(0)
 }
\ No newline at end of file