diff --git a/java/execution/impl/src/com/intellij/execution/impl/JavaScratchCompilationSupport.java b/java/execution/impl/src/com/intellij/execution/impl/JavaScratchCompilationSupport.java
index 5bfb4ba6f4a3..00327b870eca 100644
--- a/java/execution/impl/src/com/intellij/execution/impl/JavaScratchCompilationSupport.java
+++ b/java/execution/impl/src/com/intellij/execution/impl/JavaScratchCompilationSupport.java
@@ -140,6 +140,7 @@ public class JavaScratchCompilationSupport implements ProjectComponent, CompileT
       }
 
       final List<String> options = new ArrayList<String>();
+      options.add("-g"); // always compile with debug info
       final JavaSdkVersion sdkVersion = JavaSdk.getInstance().getVersion(targetSdk);
       if (sdkVersion != null) {
         final String langLevel = "1." + Integer.valueOf(3 + sdkVersion.getMaxLanguageLevel().ordinal());