diff --git a/compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/AlternativeSignatureParsing.java b/compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/AlternativeSignatureParsing.java
index 62d510bd89f..afb80800966 100644
--- a/compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/AlternativeSignatureParsing.java
+++ b/compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/AlternativeSignatureParsing.java
@@ -147,15 +147,23 @@ class AlternativeSignatureParsing {
         List<ValueParameterDescriptor> altParamDescriptors = new ArrayList<ValueParameterDescriptor>();
         for (int i = 0, size = parameterDescriptors.size(); i < size; i++) {
             ValueParameterDescriptor pd = parameterDescriptors.get(i);
-            JetTypeElement alternativeTypeElement = altFunDeclaration.getValueParameters().get(i).getTypeReference().getTypeElement();
+            JetParameter valueParameter = altFunDeclaration.getValueParameters().get(i);
+            JetTypeElement alternativeTypeElement = valueParameter.getTypeReference().getTypeElement();
             JetType alternativeType;
             JetType alternativeVarargElementType;
-            // TODO check that alternative PSI has "vararg" modifier
             if (pd.getVarargElementType() == null) {
+                if (valueParameter.isVarArg()) {
+                    throw new AlternativeSignatureMismatchException(
+                            "Parameter in method signature is not vararg, but in alternative signature it is vararg");
+                }
                 alternativeType = computeAlternativeTypeFromAnnotation(alternativeTypeElement, pd.getType());
                 alternativeVarargElementType = null;
             }
             else {
+                if (!valueParameter.isVarArg()) {
+                    throw new AlternativeSignatureMismatchException(
+                            "Parameter in method signature is vararg, but in alternative signature it is not");
+                }
                 alternativeVarargElementType = computeAlternativeTypeFromAnnotation(alternativeTypeElement, pd.getVarargElementType());
                 alternativeType = JetStandardLibrary.getInstance().getArrayType(alternativeVarargElementType);
             }
diff --git a/compiler/testData/readJavaBinaryClass/kotlinSignature/error/NotVarargReplacedWithVararg.java b/compiler/testData/readJavaBinaryClass/kotlinSignature/error/NotVarargReplacedWithVararg.java
new file mode 100644
index 00000000000..0e835fbd860
--- /dev/null
+++ b/compiler/testData/readJavaBinaryClass/kotlinSignature/error/NotVarargReplacedWithVararg.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2010-2012 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 test;
+
+import java.lang.String;
+import java.lang.UnsupportedOperationException;
+import java.util.*;
+import java.util.BitSet;
+import java.util.List;
+
+import jet.runtime.typeinfo.KotlinSignature;
+
+public class NotVarargReplacedWithVararg {
+    @KotlinSignature("fun foo(vararg s : String)")
+    public void foo(String s) {
+    }
+}
diff --git a/compiler/testData/readJavaBinaryClass/kotlinSignature/error/NotVarargReplacedWithVararg.kt b/compiler/testData/readJavaBinaryClass/kotlinSignature/error/NotVarargReplacedWithVararg.kt
new file mode 100644
index 00000000000..a4b2a4a3e4b
--- /dev/null
+++ b/compiler/testData/readJavaBinaryClass/kotlinSignature/error/NotVarargReplacedWithVararg.kt
@@ -0,0 +1,9 @@
+package test
+
+import java.util.*
+
+public open class NotVarargReplacedWithVararg : Object() {
+    public open fun foo(p0 : String?) {
+        throw UnsupportedOperationException()
+    }
+}
diff --git a/compiler/testData/readJavaBinaryClass/kotlinSignature/error/NotVarargReplacedWithVararg.txt b/compiler/testData/readJavaBinaryClass/kotlinSignature/error/NotVarargReplacedWithVararg.txt
new file mode 100644
index 00000000000..5e2409cbc72
--- /dev/null
+++ b/compiler/testData/readJavaBinaryClass/kotlinSignature/error/NotVarargReplacedWithVararg.txt
@@ -0,0 +1,6 @@
+namespace test
+
+public open class test.NotVarargReplacedWithVararg : java.lang.Object {
+    public final /*constructor*/ fun <init>(): test.NotVarargReplacedWithVararg
+    public open fun foo(/*0*/ p0: jet.String?): jet.Tuple0
+}
diff --git a/compiler/testData/readJavaBinaryClass/kotlinSignature/error/VarargReplacedWithNotVararg.java b/compiler/testData/readJavaBinaryClass/kotlinSignature/error/VarargReplacedWithNotVararg.java
new file mode 100644
index 00000000000..d0ce03358e0
--- /dev/null
+++ b/compiler/testData/readJavaBinaryClass/kotlinSignature/error/VarargReplacedWithNotVararg.java
@@ -0,0 +1,15 @@
+package test;
+
+import java.lang.String;
+import java.lang.UnsupportedOperationException;
+import java.util.*;
+import java.util.BitSet;
+import java.util.List;
+
+import jet.runtime.typeinfo.KotlinSignature;
+
+public class VarargReplacedWithNotVararg {
+    @KotlinSignature("fun foo(s : String)")
+    public void foo(String... s) {
+    }
+}
diff --git a/compiler/testData/readJavaBinaryClass/kotlinSignature/error/VarargReplacedWithNotVararg.kt b/compiler/testData/readJavaBinaryClass/kotlinSignature/error/VarargReplacedWithNotVararg.kt
new file mode 100644
index 00000000000..9e1f210ecfa
--- /dev/null
+++ b/compiler/testData/readJavaBinaryClass/kotlinSignature/error/VarargReplacedWithNotVararg.kt
@@ -0,0 +1,9 @@
+package test
+
+import java.util.*
+
+public open class VarargReplacedWithNotVararg : Object() {
+    public open fun foo(vararg p0 : String?) {
+        throw UnsupportedOperationException()
+    }
+}
diff --git a/compiler/testData/readJavaBinaryClass/kotlinSignature/error/VarargReplacedWithNotVararg.txt b/compiler/testData/readJavaBinaryClass/kotlinSignature/error/VarargReplacedWithNotVararg.txt
new file mode 100644
index 00000000000..84d1f9f9740
--- /dev/null
+++ b/compiler/testData/readJavaBinaryClass/kotlinSignature/error/VarargReplacedWithNotVararg.txt
@@ -0,0 +1,6 @@
+namespace test
+
+public open class test.VarargReplacedWithNotVararg : java.lang.Object {
+    public final /*constructor*/ fun <init>(): test.VarargReplacedWithNotVararg
+    public open fun foo(/*0*/ vararg p0: jet.String? /*jet.Array<jet.String?>*/): jet.Tuple0
+}