diff --git a/compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/kotlinSignature/SignaturesPropagationData.java b/compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/kotlinSignature/SignaturesPropagationData.java
index 801b579885e..4eecef9f415 100644
--- a/compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/kotlinSignature/SignaturesPropagationData.java
+++ b/compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/kotlinSignature/SignaturesPropagationData.java
@@ -26,7 +26,6 @@ import org.jetbrains.annotations.NotNull;
 import org.jetbrains.jet.lang.descriptors.*;
 import org.jetbrains.jet.lang.resolve.BindingContext;
 import org.jetbrains.jet.lang.resolve.BindingTrace;
-import org.jetbrains.jet.lang.resolve.DescriptorUtils;
 import org.jetbrains.jet.lang.resolve.java.CollectionClassMapping;
 import org.jetbrains.jet.lang.resolve.java.JavaDescriptorResolver;
 import org.jetbrains.jet.lang.resolve.java.wrapper.PsiMethodWrapper;
@@ -38,6 +37,9 @@ import org.jetbrains.jet.lang.types.lang.KotlinBuiltIns;
 
 import java.util.*;
 
+import static org.jetbrains.jet.lang.resolve.DescriptorUtils.getFQName;
+import static org.jetbrains.jet.lang.resolve.DescriptorUtils.getVarargParameterType;
+
 public class SignaturesPropagationData {
     private final List<TypeParameterDescriptor> modifiedTypeParameters;
     private final JavaDescriptorResolver.ValueParameterDescriptors modifiedValueParameters;
@@ -210,8 +212,8 @@ public class SignaturesPropagationData {
         Collections.sort(superFunctions, new Comparator<FunctionDescriptor>() {
             @Override
             public int compare(FunctionDescriptor fun1, FunctionDescriptor fun2) {
-                FqNameUnsafe fqName1 = DescriptorUtils.getFQName(fun1.getContainingDeclaration());
-                FqNameUnsafe fqName2 = DescriptorUtils.getFQName(fun2.getContainingDeclaration());
+                FqNameUnsafe fqName1 = getFQName(fun1.getContainingDeclaration());
+                FqNameUnsafe fqName2 = getFQName(fun2.getContainingDeclaration());
                 return fqName1.getFqName().compareTo(fqName2.getFqName());
             }
         });
@@ -244,13 +246,14 @@ public class SignaturesPropagationData {
 
             // convert to vararg; replace Array<out Foo>? with Array<Foo>
             JetType varargElementType = KotlinBuiltIns.getInstance().getArrayElementType(originalType);
-            return new VarargCheckResult(getArrayType(varargElementType, Variance.INVARIANT), true);
+            return new VarargCheckResult(getVarargParameterType(varargElementType), true);
         }
         else if (someSupersNotVararg && originalVarargElementType != null) {
             assert isArrayType(originalType);
 
             // convert to non-vararg; replace Array<Foo> with Array<out Foo>?
-            return new VarargCheckResult(TypeUtils.makeNullable(getArrayType(originalVarargElementType, Variance.OUT_VARIANCE)), false);
+            return new VarargCheckResult(TypeUtils.makeNullable(getVarargParameterType(originalVarargElementType, Variance.OUT_VARIANCE)),
+                                         false);
         }
 
         return new VarargCheckResult(originalType, originalVarargElementType != null);
@@ -524,18 +527,6 @@ public class SignaturesPropagationData {
         return builtIns.isArray(type) || builtIns.isPrimitiveArray(type);
     }
 
-    @NotNull
-    private static JetType getArrayType(@NotNull JetType elementType, @NotNull Variance projectionKind) {
-        KotlinBuiltIns builtIns = KotlinBuiltIns.getInstance();
-        JetType primitiveArrayType = builtIns.getPrimitiveArrayJetTypeByPrimitiveJetType(elementType);
-        if (primitiveArrayType != null) {
-            return primitiveArrayType;
-        }
-        else {
-            return builtIns.getArrayType(projectionKind, elementType);
-        }
-    }
-
     private static class VarargCheckResult {
         public final JetType parameterType;
         public final boolean isVararg;
diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/DescriptorResolver.java b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/DescriptorResolver.java
index 419df0f51d8..417ea5a8135 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/DescriptorResolver.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/DescriptorResolver.java
@@ -474,7 +474,7 @@ public class DescriptorResolver {
         JetType variableType = type;
         if (valueParameter.hasModifier(JetTokens.VARARG_KEYWORD)) {
             varargElementType = type;
-            variableType = getVarargParameterType(type);
+            variableType = DescriptorUtils.getVarargParameterType(type);
         }
         MutableValueParameterDescriptor valueParameterDescriptor = new ValueParameterDescriptorImpl(
                 declarationDescriptor,
@@ -491,16 +491,6 @@ public class DescriptorResolver {
         return valueParameterDescriptor;
     }
 
-    private JetType getVarargParameterType(JetType type) {
-        JetType arrayType = KotlinBuiltIns.getInstance().getPrimitiveArrayJetTypeByPrimitiveJetType(type);
-        if (arrayType != null) {
-            return arrayType;
-        }
-        else {
-            return KotlinBuiltIns.getInstance().getArrayType(type);
-        }
-    }
-
     public List<TypeParameterDescriptorImpl> resolveTypeParametersForCallableDescriptor(
             DeclarationDescriptor containingDescriptor,
             WritableScope extensibleScope,
@@ -705,7 +695,7 @@ public class DescriptorResolver {
             type = ErrorUtils.createErrorType("Annotation is absent");
         }
         if (parameter.hasModifier(JetTokens.VARARG_KEYWORD)) {
-            return getVarargParameterType(type);
+            return DescriptorUtils.getVarargParameterType(type);
         }
         return type;
     }
diff --git a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/DescriptorUtils.java b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/DescriptorUtils.java
index 17ed36689b2..c5ac9d493f8 100644
--- a/compiler/frontend/src/org/jetbrains/jet/lang/resolve/DescriptorUtils.java
+++ b/compiler/frontend/src/org/jetbrains/jet/lang/resolve/DescriptorUtils.java
@@ -31,6 +31,7 @@ import org.jetbrains.jet.lang.resolve.scopes.receivers.ReceiverValue;
 import org.jetbrains.jet.lang.types.DescriptorSubstitutor;
 import org.jetbrains.jet.lang.types.JetType;
 import org.jetbrains.jet.lang.types.TypeUtils;
+import org.jetbrains.jet.lang.types.Variance;
 import org.jetbrains.jet.lang.types.checker.JetTypeChecker;
 import org.jetbrains.jet.lang.types.lang.KotlinBuiltIns;
 
@@ -391,4 +392,21 @@ public class DescriptorUtils {
         return propertyDescriptor.getVisibility() != Visibilities.PRIVATE || isClassObject(propertyDescriptor.getContainingDeclaration())
                || propertyDescriptor.getContainingDeclaration() instanceof NamespaceDescriptor;
     }
+
+    @NotNull
+    public static JetType getVarargParameterType(@NotNull JetType elementType) {
+        return getVarargParameterType(elementType, Variance.INVARIANT);
+    }
+
+    @NotNull
+    public static JetType getVarargParameterType(@NotNull JetType elementType, @NotNull Variance projectionKind) {
+        KotlinBuiltIns builtIns = KotlinBuiltIns.getInstance();
+        JetType primitiveArrayType = builtIns.getPrimitiveArrayJetTypeByPrimitiveJetType(elementType);
+        if (primitiveArrayType != null) {
+            return primitiveArrayType;
+        }
+        else {
+            return builtIns.getArrayType(projectionKind, elementType);
+        }
+    }
 }