diff --git a/compiler/frontend/src/org/jetbrains/jet/config/CompilerConfiguration.java b/compiler/frontend/src/org/jetbrains/jet/config/CompilerConfiguration.java
index 9eba99abf6e..339eb8e1864 100644
--- a/compiler/frontend/src/org/jetbrains/jet/config/CompilerConfiguration.java
+++ b/compiler/frontend/src/org/jetbrains/jet/config/CompilerConfiguration.java
@@ -22,6 +22,7 @@ import org.jetbrains.annotations.Nullable;
 
 import java.util.*;
 
+@SuppressWarnings("unchecked")
 public class CompilerConfiguration {
     private final Map<Key, Object> map = new HashMap<Key, Object>();
     private boolean readOnly = false;