diff --git a/j2k/src/org/jetbrains/jet/j2k/ast/AssertStatement.kt b/j2k/src/org/jetbrains/jet/j2k/ast/AssertStatement.kt
deleted file mode 100644
index a43fef22c9f..00000000000
--- a/j2k/src/org/jetbrains/jet/j2k/ast/AssertStatement.kt
+++ /dev/null
@@ -1,28 +0,0 @@
-/*
- * Copyright 2010-2013 JetBrains s.r.o.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.jetbrains.jet.j2k.ast
-
-
-class AssertStatement(val condition: Expression, val detail: Expression) : Statement() {
-    override fun toKotlin(): String {
-        val lazyStringMessage = if (detail != Expression.Empty)
-            " {" + detail.toKotlin() + "}"
-        else
-            ""
-        return "assert(${condition.toKotlin()})$lazyStringMessage"
-    }
-}
diff --git a/j2k/src/org/jetbrains/jet/j2k/visitors/StatementVisitor.kt b/j2k/src/org/jetbrains/jet/j2k/visitors/StatementVisitor.kt
index 6518a05bc97..04b61e433e9 100644
--- a/j2k/src/org/jetbrains/jet/j2k/visitors/StatementVisitor.kt
+++ b/j2k/src/org/jetbrains/jet/j2k/visitors/StatementVisitor.kt
@@ -30,8 +30,20 @@ open class StatementVisitor(public val converter: Converter) : JavaElementVisito
         protected set
 
     override fun visitAssertStatement(statement: PsiAssertStatement) {
-        result = AssertStatement(converter.convertExpression(statement.getAssertCondition()),
-                                   converter.convertExpression(statement.getAssertDescription()))
+        val descriptionExpr = statement.getAssertDescription()
+        val condition = converter.convertExpression(statement.getAssertCondition())
+        if (descriptionExpr == null) {
+            result = MethodCallExpression.buildNotNull(null, "assert", listOf(condition))
+        }
+        else {
+            val description = converter.convertExpression(descriptionExpr)
+            if (descriptionExpr is PsiLiteralExpression) {
+                result = MethodCallExpression.buildNotNull(null, "assert", listOf(condition, description))
+            }
+            else {
+                result = MethodCallExpression.build(null, "assert", listOf(condition), listOf(), false, LambdaExpression(null, StatementList(listOf(description))))
+            }
+        }
     }
 
     override fun visitBlockStatement(statement: PsiBlockStatement) {
diff --git a/j2k/tests/test/org/jetbrains/jet/j2k/test/JavaToKotlinConverterTestGenerated.java b/j2k/tests/test/org/jetbrains/jet/j2k/test/JavaToKotlinConverterTestGenerated.java
index 97953f10520..a968d0189bc 100644
--- a/j2k/tests/test/org/jetbrains/jet/j2k/test/JavaToKotlinConverterTestGenerated.java
+++ b/j2k/tests/test/org/jetbrains/jet/j2k/test/JavaToKotlinConverterTestGenerated.java
@@ -248,6 +248,11 @@ public class JavaToKotlinConverterTestGenerated extends AbstractJavaToKotlinConv
             doTest("j2k/tests/testData/ast/assertStatement/withStringDetail.java");
         }
         
+        @TestMetadata("withStringDetail2.java")
+        public void testWithStringDetail2() throws Exception {
+            doTest("j2k/tests/testData/ast/assertStatement/withStringDetail2.java");
+        }
+        
     }
     
     @TestMetadata("j2k/tests/testData/ast/assignmentExpression")
diff --git a/j2k/tests/testData/ast/assertStatement/withStringDetail.kt b/j2k/tests/testData/ast/assertStatement/withStringDetail.kt
index dbf44bd5eb8..720ccd99f52 100644
--- a/j2k/tests/testData/ast/assertStatement/withStringDetail.kt
+++ b/j2k/tests/testData/ast/assertStatement/withStringDetail.kt
@@ -1 +1 @@
-assert(true) { "string details" }
\ No newline at end of file
+assert(true, "string details")
\ No newline at end of file
diff --git a/j2k/tests/testData/ast/assertStatement/withStringDetail2.java b/j2k/tests/testData/ast/assertStatement/withStringDetail2.java
new file mode 100644
index 00000000000..c8b9e98482f
--- /dev/null
+++ b/j2k/tests/testData/ast/assertStatement/withStringDetail2.java
@@ -0,0 +1,2 @@
+//statement
+assert true : "string details:" + x;
\ No newline at end of file
diff --git a/j2k/tests/testData/ast/assertStatement/withStringDetail2.kt b/j2k/tests/testData/ast/assertStatement/withStringDetail2.kt
new file mode 100644
index 00000000000..97aa2c8f30f
--- /dev/null
+++ b/j2k/tests/testData/ast/assertStatement/withStringDetail2.kt
@@ -0,0 +1 @@
+assert(true) { "string details:" + x }
\ No newline at end of file