diff --git a/platform/lang-impl/src/com/intellij/codeInsight/lookup/impl/LookupImpl.java b/platform/lang-impl/src/com/intellij/codeInsight/lookup/impl/LookupImpl.java
index f72cdc2b4061..896e5e1a863e 100644
--- a/platform/lang-impl/src/com/intellij/codeInsight/lookup/impl/LookupImpl.java
+++ b/platform/lang-impl/src/com/intellij/codeInsight/lookup/impl/LookupImpl.java
@@ -230,7 +230,18 @@ public class LookupImpl extends LightweightHint implements LookupEx, Disposable
 
   public void setCalculating(final boolean calculating) {
     myCalculating = calculating;
-    myIconPanel.setVisible(calculating);
+    Runnable setVisible = new Runnable() {
+      @Override
+      public void run() {
+        myIconPanel.setVisible(myCalculating);
+      }
+    };
+    if (myCalculating) {
+      new Alarm().addRequest(setVisible, 100);
+    } else {
+      setVisible.run();
+    }
+
     if (calculating) {
       myProcessIcon.resume();
     } else {