diff --git a/src/org/jetbrains/jet/j2k/ast/MethodCallExpression.java b/src/org/jetbrains/jet/j2k/ast/MethodCallExpression.java
index 0c8a1d21536..5bfc87b69f5 100644
--- a/src/org/jetbrains/jet/j2k/ast/MethodCallExpression.java
+++ b/src/org/jetbrains/jet/j2k/ast/MethodCallExpression.java
@@ -10,13 +10,19 @@ import java.util.List;
  */
 public class MethodCallExpression extends Expression {
   private final Expression myMethodCall;
-  private final Element myParamList;
+  private final List<Expression> myArguments;
+  private List<String> myConversions;
   private final boolean myIsResultNullable;
   private final List<Type> myTypeParameters;
 
-  public MethodCallExpression(Expression methodCall, Element paramList, boolean nullable, List<Type> typeParameters) {
+  public MethodCallExpression(Expression methodCall, List<Expression> arguments, boolean nullable, List<Type> typeParameters) {
+    this(methodCall, arguments, AstUtil.createListWithEmptyString(arguments), nullable, typeParameters);
+  }
+
+  public MethodCallExpression(Expression methodCall, List<Expression> arguments, List<String> conversions, boolean nullable, List<Type> typeParameters) {
     myMethodCall = methodCall;
-    myParamList = paramList;
+    myArguments = arguments;
+    myConversions = conversions;
     myIsResultNullable = nullable;
     myTypeParameters = typeParameters;
   }
@@ -30,6 +36,7 @@ public class MethodCallExpression extends Expression {
   @Override
   public String toKotlin() {
     String typeParamsToKotlin = myTypeParameters.size() > 0 ? "<" + AstUtil.joinNodes(myTypeParameters, COMMA_WITH_SPACE) + ">" : EMPTY;
-    return myMethodCall.toKotlin() + typeParamsToKotlin + "(" + myParamList.toKotlin() + ")";
+    List<String> applyConversions = AstUtil.applyConversions(AstUtil.nodesToKotlin(myArguments), myConversions);
+    return myMethodCall.toKotlin() + typeParamsToKotlin + "(" + AstUtil.join(applyConversions, COMMA_WITH_SPACE) + ")";
   }
 }
diff --git a/src/org/jetbrains/jet/j2k/util/AstUtil.java b/src/org/jetbrains/jet/j2k/util/AstUtil.java
index d5715267101..a814767880a 100644
--- a/src/org/jetbrains/jet/j2k/util/AstUtil.java
+++ b/src/org/jetbrains/jet/j2k/util/AstUtil.java
@@ -1,5 +1,6 @@
 package org.jetbrains.jet.j2k.util;
 
+import org.jetbrains.jet.j2k.ast.Expression;
 import org.jetbrains.jet.j2k.ast.INode;
 
 import java.util.LinkedList;
@@ -44,4 +45,23 @@ public class AstUtil {
   public static String upperFirstCharacter(String string) {
     return string.substring(0, 1).toUpperCase() + string.substring(1);
   }
+
+  public static List<String> createListWithEmptyString(final List<Expression> arguments) {
+    final List<String> conversions = new LinkedList<String>();
+    //noinspection UnusedDeclaration
+    for (Expression argument : arguments) conversions.add("");
+    return conversions;
+  }
+
+  public static List<String> applyConversions(List<String> first, List<String> second) {
+    List<String> result = new LinkedList<String>();
+    assert first.size() == second.size() : "Lists must have the same size.";
+    for (int i = 0; i < first.size(); i++) {
+      if (second.get(i).isEmpty())
+        result.add(first.get(i));
+      else
+        result.add("(" + first.get(i) + ")" + second.get(i));
+    }
+    return result;
+  }
 }
diff --git a/src/org/jetbrains/jet/j2k/visitors/ExpressionVisitor.java b/src/org/jetbrains/jet/j2k/visitors/ExpressionVisitor.java
index 7654d99f923..9a587d8c4ad 100644
--- a/src/org/jetbrains/jet/j2k/visitors/ExpressionVisitor.java
+++ b/src/org/jetbrains/jet/j2k/visitors/ExpressionVisitor.java
@@ -7,8 +7,7 @@ import org.jetbrains.annotations.Nullable;
 import org.jetbrains.jet.j2k.Converter;
 import org.jetbrains.jet.j2k.ast.*;
 
-import java.util.Collections;
-import java.util.List;
+import java.util.*;
 
 import static org.jetbrains.jet.j2k.Converter.*;
 
@@ -190,14 +189,93 @@ public class ExpressionVisitor extends StatementVisitor {
   @Override
   public void visitMethodCallExpression(@NotNull PsiMethodCallExpression expression) {
     super.visitMethodCallExpression(expression);
-    if (!SuperVisitor.isSuper(expression.getMethodExpression()) || !isInsidePrimaryConstructor(expression))
+    if (!SuperVisitor.isSuper(expression.getMethodExpression()) || !isInsidePrimaryConstructor(expression)) {
+      List<String> conversions = new LinkedList<String>();
+      PsiExpression[] arguments = expression.getArgumentList().getExpressions();
+      //noinspection UnusedDeclaration
+      for (final PsiExpression a : arguments) {
+        conversions.add("");
+      }
+
+      PsiMethod resolve = expression.resolveMethod();
+      if (resolve != null) {
+        List<PsiType> expectedTypes = new LinkedList<PsiType>();
+        List<PsiType> actualTypes = new LinkedList<PsiType>();
+
+        for (PsiParameter p : resolve.getParameterList().getParameters())
+          expectedTypes.add(p.getType());
+
+        for (PsiExpression e : arguments)
+          actualTypes.add(e.getType());
+
+        assert actualTypes.size() == expectedTypes.size() : "The type list must have the same length";
+
+        for (int i = 0; i < actualTypes.size(); i++) {
+          PsiType actual = actualTypes.get(i);
+          PsiType expected = expectedTypes.get(i);
+
+          if (isConversionNeeded(actual, expected)) {
+            conversions.set(i, getPrimitiveTypeConversion(expected.getCanonicalText()));
+          }
+        }
+      }
+
       myResult = // TODO: not resolved
         new MethodCallExpression(
           expressionToExpression(expression.getMethodExpression()),
-          elementToElement(expression.getArgumentList()),
+          expressionsToExpressionList(arguments),
+          conversions,
           typeToType(expression.getType()).isNullable(),
           typesToTypeList(expression.getTypeArguments())
         );
+    }
+  }
+
+  private static boolean isConversionNeeded(final PsiType actual, final PsiType expected) {
+    Map<String, String> typeMap = new HashMap<String, String>();
+    typeMap.put("java.lang.Byte", "byte");
+    typeMap.put("java.lang.Short", "short");
+    typeMap.put("java.lang.Integer", "int");
+    typeMap.put("java.lang.Long", "long");
+    typeMap.put("java.lang.Float", "float");
+    typeMap.put("java.lang.Double", "double");
+    typeMap.put("java.lang.Character", "char");
+    String expectedStr = expected.getCanonicalText();
+    String actualStr = actual.getCanonicalText();
+    boolean o1 = getOrElse(typeMap, actualStr, "").equals(expectedStr);
+    boolean o2 = getOrElse(typeMap, expectedStr, "").equals(actualStr);
+    return !actualStr.equals(expectedStr) && (!(o1 ^ o2));
+  }
+
+  
+
+  private static <T> T getOrElse(Map<T, T> map, T e, T orElse) {
+    if (map.containsKey(e))
+      return map.get(e);
+    return orElse;
+  }
+
+  private static String getPrimitiveTypeConversion(String type) {
+    Map<String, String> conversions = new HashMap<String, String>();
+    conversions.put("byte", "byt");
+    conversions.put("short", "sht");
+    conversions.put("int", "int");
+    conversions.put("long", "lng");
+    conversions.put("float", "flt");
+    conversions.put("double", "dbl");
+    conversions.put("char", "chr");
+
+    conversions.put("java.lang.Byte", "byt");
+    conversions.put("java.lang.Short", "sht");
+    conversions.put("java.lang.Integer", "int");
+    conversions.put("java.lang.Long", "lng");
+    conversions.put("java.lang.Float", "flt");
+    conversions.put("java.lang.Double", "dbl");
+    conversions.put("java.lang.Character", "chr");
+
+    if (conversions.containsKey(type))
+      return "." + conversions.get(type);
+    return "";
   }
 
   @Override
@@ -224,22 +302,24 @@ public class ExpressionVisitor extends StatementVisitor {
     final PsiMethod constructor = expression.resolveMethod();
     PsiJavaCodeReferenceElement classReference = expression.getClassOrAnonymousClassReference();
     final boolean isNotConvertedClass = classReference != null && !Converter.getClassIdentifiers().contains(classReference.getQualifiedName());
+    PsiExpressionList argumentList = expression.getArgumentList();
     if (constructor == null || isConstructorPrimary(constructor) || isNotConvertedClass) {
       return new NewClassExpression(
         expressionToExpression(expression.getQualifier()),
         elementToElement(classReference),
-        elementToElement(expression.getArgumentList()),
+        elementToElement(argumentList),
         anonymousClass != null ? anonymousClassToAnonymousClass(anonymousClass) : null
       );
     }
     // is constructor secondary
     final PsiJavaCodeReferenceElement reference = expression.getClassReference();
     final List<Type> typeParameters = reference != null ? typesToTypeList(reference.getTypeParameters()) : Collections.<Type>emptyList();
+    PsiExpression[] expressions = argumentList != null ? argumentList.getExpressions() : new PsiExpression[]{};
     return new CallChainExpression(
       new IdentifierImpl(constructor.getName(), false),
       new MethodCallExpression(
         new IdentifierImpl("init"),
-        elementToElement(expression.getArgumentList()),
+        expressionsToExpressionList(expressions),
         false,
         typeParameters));
   }
diff --git a/testData/ast/issues/file/kt-543-boxed.jav b/testData/ast/issues/file/kt-543-boxed.jav
new file mode 100644
index 00000000000..e1f28f04faa
--- /dev/null
+++ b/testData/ast/issues/file/kt-543-boxed.jav
@@ -0,0 +1,13 @@
+package demo;
+
+class Test {
+  void putInt(Integer i) {}
+
+  void test() {
+    byte b = 10;
+    putInt(b);
+
+    Byte b2 = 10;
+    putInt(b2);
+  }
+}
\ No newline at end of file
diff --git a/testData/ast/issues/file/kt-543-boxed.kt b/testData/ast/issues/file/kt-543-boxed.kt
new file mode 100644
index 00000000000..dafbd546c92
--- /dev/null
+++ b/testData/ast/issues/file/kt-543-boxed.kt
@@ -0,0 +1,11 @@
+namespace demo
+open class Test() {
+open fun putInt(i : Int?) : Unit {
+}
+open fun test() : Unit {
+var b : Byte = 10
+putInt((b).int)
+var b2 : Byte? = 10
+putInt((b2).int)
+}
+}
\ No newline at end of file
diff --git a/testData/ast/issues/file/kt-543-mixed.jav b/testData/ast/issues/file/kt-543-mixed.jav
new file mode 100644
index 00000000000..1193a5403bb
--- /dev/null
+++ b/testData/ast/issues/file/kt-543-mixed.jav
@@ -0,0 +1,10 @@
+package demo;
+
+class Test {
+  void putInt(Integer i) {}
+
+  void test() {
+    int i = 10;
+    putInt(i);
+  }
+}
\ No newline at end of file
diff --git a/testData/ast/issues/file/kt-543-mixed.kt b/testData/ast/issues/file/kt-543-mixed.kt
new file mode 100644
index 00000000000..1fd99286342
--- /dev/null
+++ b/testData/ast/issues/file/kt-543-mixed.kt
@@ -0,0 +1,9 @@
+namespace demo
+open class Test() {
+open fun putInt(i : Int?) : Unit {
+}
+open fun test() : Unit {
+var i : Int = 10
+putInt(i)
+}
+}
\ No newline at end of file
diff --git a/testData/ast/issues/file/kt-543.jav b/testData/ast/issues/file/kt-543.jav
new file mode 100644
index 00000000000..c5e0e602076
--- /dev/null
+++ b/testData/ast/issues/file/kt-543.jav
@@ -0,0 +1,10 @@
+package demo;
+
+class Test {
+  void putInt(int i) {}
+
+  void test() {
+    byte b = 10;
+    putInt(b);
+  }
+}
\ No newline at end of file
diff --git a/testData/ast/issues/file/kt-543.kt b/testData/ast/issues/file/kt-543.kt
new file mode 100644
index 00000000000..9e06bf3f48c
--- /dev/null
+++ b/testData/ast/issues/file/kt-543.kt
@@ -0,0 +1,9 @@
+namespace demo
+open class Test() {
+open fun putInt(i : Int) : Unit {
+}
+open fun test() : Unit {
+var b : Byte = 10
+putInt((b).int)
+}
+}
\ No newline at end of file