diff --git a/platform/xdebugger-impl/src/com/intellij/xdebugger/impl/XDebuggerHistoryManager.java b/platform/xdebugger-impl/src/com/intellij/xdebugger/impl/XDebuggerHistoryManager.java
index 55c2f95f6fc7..7a8d150f9ada 100644
--- a/platform/xdebugger-impl/src/com/intellij/xdebugger/impl/XDebuggerHistoryManager.java
+++ b/platform/xdebugger-impl/src/com/intellij/xdebugger/impl/XDebuggerHistoryManager.java
@@ -97,7 +97,7 @@ public class XDebuggerHistoryManager implements PersistentStateComponent<Element
     @Tag("expression-string") String myExpression;
     @Tag("language-id") String myLanguageId;
     @Tag("custom-info") String myCustomInfo;
-    @Tag("evaluation-mode") EvaluationMode myEvaluationMode;
+    @Tag("evaluation-mode") EvaluationMode myEvaluationMode = EvaluationMode.EXPRESSION;
 
     @SuppressWarnings("unused")
     ExpressionState() {