diff --git a/compiler/frontend/src/org/jetbrains/jet/config/CompilerConfiguration.java b/compiler/frontend/src/org/jetbrains/jet/config/CompilerConfiguration.java
index 339eb8e1864..35a0db766d5 100644
--- a/compiler/frontend/src/org/jetbrains/jet/config/CompilerConfiguration.java
+++ b/compiler/frontend/src/org/jetbrains/jet/config/CompilerConfiguration.java
@@ -111,6 +111,11 @@ public class CompilerConfiguration {
         }
     }
 
+    @Override
+    public String toString() {
+        return map.toString();
+    }
+
     private static <T> void checkForNullElements(Collection<T> values) {
         int index = 0;
         for (T value : values) {