diff --git a/compiler/backend/src/org/jetbrains/jet/codegen/ExpressionCodegen.java b/compiler/backend/src/org/jetbrains/jet/codegen/ExpressionCodegen.java
index 2d719a3c26e..5f30fb424cc 100644
--- a/compiler/backend/src/org/jetbrains/jet/codegen/ExpressionCodegen.java
+++ b/compiler/backend/src/org/jetbrains/jet/codegen/ExpressionCodegen.java
@@ -1881,10 +1881,10 @@ public class ExpressionCodegen extends JetVisitor<StackValue, StackValue> {
 
     private StackValue generateIn(JetBinaryExpression expression) {
         JetExpression expr = expression.getLeft();
+        boolean inverted = expression.getOperationReference().getReferencedNameElementType() == JetTokens.NOT_IN;
         if (isIntRangeExpr(expression.getRight())) {
             StackValue leftValue = StackValue.expression(Type.INT_TYPE, expression.getLeft(), this);
             JetBinaryExpression rangeExpression = (JetBinaryExpression) expression.getRight();
-            boolean inverted = expression.getOperationReference().getReferencedNameElementType() == JetTokens.NOT_IN;
             getInIntRange(leftValue, rangeExpression, inverted);
         }
         else {
@@ -1904,6 +1904,9 @@ public class ExpressionCodegen extends JetVisitor<StackValue, StackValue> {
                 v.pop();
             }
             invokeFunctionNoParams(op, Type.BOOLEAN_TYPE, v);
+            if (inverted) {
+                invertBoolean();
+            }
         }
         return StackValue.onStack(Type.BOOLEAN_TYPE);
     }
@@ -1943,8 +1946,7 @@ public class ExpressionCodegen extends JetVisitor<StackValue, StackValue> {
 
         v.and(Type.INT_TYPE);
         if (inverted) {
-            v.iconst(1);
-            v.xor(Type.INT_TYPE);
+            invertBoolean();
         }
     }
 
@@ -2042,8 +2044,7 @@ public class ExpressionCodegen extends JetVisitor<StackValue, StackValue> {
         if (!leftNullable) {
             v.invokevirtual("java/lang/Object", "equals", "(Ljava/lang/Object;)Z");
             if (opToken == JetTokens.EXCLEQ) {
-                v.iconst(1);
-                v.xor(Type.INT_TYPE);
+                invertBoolean();
             }
         }
         else {
@@ -2055,8 +2056,7 @@ public class ExpressionCodegen extends JetVisitor<StackValue, StackValue> {
                 v.ifnull(leftNull);
                 v.invokevirtual("java/lang/Object", "equals", "(Ljava/lang/Object;)Z");
                 if (opToken == JetTokens.EXCLEQ || opToken == JetTokens.EXCLEQEQEQ) {
-                    v.iconst(1);
-                    v.xor(Type.INT_TYPE);
+                    invertBoolean();
                 }
                 Label end = new Label();
                 v.goTo(end);
@@ -2080,8 +2080,7 @@ public class ExpressionCodegen extends JetVisitor<StackValue, StackValue> {
                 v.ifnull(leftNull);
                 v.invokevirtual("java/lang/Object", "equals", "(Ljava/lang/Object;)Z");
                 if (opToken == JetTokens.EXCLEQ || opToken == JetTokens.EXCLEQEQEQ) {
-                    v.iconst(1);
-                    v.xor(Type.INT_TYPE);
+                    invertBoolean();
                 }
                 Label end = new Label();
                 v.goTo(end);
@@ -3035,14 +3034,18 @@ The "returned" value of try expression with no finally is either the last expres
             while (rangeExpression instanceof JetParenthesizedExpression) {
                 rangeExpression = ((JetParenthesizedExpression)rangeExpression).getExpression();
             }
+            boolean inverted = conditionInRange.getOperationReference().getReferencedNameElementType() == JetTokens.NOT_IN;
             if (isIntRangeExpr(rangeExpression)) {
-                getInIntRange(new StackValue.Local(subjectLocal, subjectType), (JetBinaryExpression) rangeExpression, conditionInRange.getOperationReference().getReferencedNameElementType() == JetTokens.NOT_IN);
+                getInIntRange(new StackValue.Local(subjectLocal, subjectType), (JetBinaryExpression) rangeExpression, inverted);
             }
             else {
                 FunctionDescriptor op = (FunctionDescriptor) bindingContext.get(BindingContext.REFERENCE_TARGET, conditionInRange.getOperationReference());
                 genToJVMStack(rangeExpression);
                 new StackValue.Local(subjectLocal, subjectType).put(TYPE_OBJECT, v);
                 invokeFunctionNoParams(op, Type.BOOLEAN_TYPE, v);
+                if(inverted) {
+                    invertBoolean();
+                }
             }
             return StackValue.onStack(Type.BOOLEAN_TYPE);
         }
@@ -3065,6 +3068,11 @@ The "returned" value of try expression with no finally is either the last expres
                                     subjectIsNullable, nextEntry);
     }
 
+    private void invertBoolean() {
+        v.iconst(1);
+        v.xor(Type.INT_TYPE);
+    }
+
     private boolean isIntRangeExpr(JetExpression rangeExpression) {
         if (rangeExpression instanceof JetBinaryExpression) {
             JetBinaryExpression binaryExpression = (JetBinaryExpression) rangeExpression;
diff --git a/compiler/testData/codegen/regressions/kt2417.kt b/compiler/testData/codegen/regressions/kt2417.kt
new file mode 100644
index 00000000000..42214b38016
--- /dev/null
+++ b/compiler/testData/codegen/regressions/kt2417.kt
@@ -0,0 +1,25 @@
+import java.util.HashSet
+
+fun box() : String{
+    val set = HashSet<String>()
+    set.add("foo")
+    val t1 = "foo" in set  // returns true, valid
+    if(!t1) return "fail1"
+    val t2 = "foo" !in set // returns true, invalid
+    if(t2) return "fail2"
+    val t3 = "bar" in set  // returns false, valid
+    if(t3) return "fail3"
+    val t4 = "bar" !in set // return false, invalid
+    if(!t4) return "fail4"
+    val t5 = when("foo") {
+      in set -> true
+      else -> false
+    }
+    if(!t5) return "fail5"
+    val t6 = when("foo") {
+      !in set -> true
+      else -> false
+    }
+    if(t6) return "fail6"
+    return "OK"
+}
\ No newline at end of file
diff --git a/compiler/tests/org/jetbrains/jet/codegen/ClassGenTest.java b/compiler/tests/org/jetbrains/jet/codegen/ClassGenTest.java
index ff85bdea642..46b7220e934 100644
--- a/compiler/tests/org/jetbrains/jet/codegen/ClassGenTest.java
+++ b/compiler/tests/org/jetbrains/jet/codegen/ClassGenTest.java
@@ -508,4 +508,9 @@ public class ClassGenTest extends CodegenTestCase {
         createEnvironmentWithMockJdkAndIdeaAnnotations(ConfigurationKind.JDK_ONLY);
         blackBoxMultiFile("regressions/kt1845_1.kt", "regressions/kt1845_2.kt");
     }
+
+    public void testKt2417() {
+        createEnvironmentWithMockJdkAndIdeaAnnotations(ConfigurationKind.JDK_ONLY);
+        blackBoxFile("regressions/kt2417.kt");
+    }
 }