diff --git a/platform/lang-impl/src/com/intellij/find/findUsages/FindUsagesManager.java b/platform/lang-impl/src/com/intellij/find/findUsages/FindUsagesManager.java
index 31573488a236..612beaa15a70 100644
--- a/platform/lang-impl/src/com/intellij/find/findUsages/FindUsagesManager.java
+++ b/platform/lang-impl/src/com/intellij/find/findUsages/FindUsagesManager.java
@@ -38,6 +38,7 @@ import com.intellij.openapi.keymap.KeymapUtil;
 import com.intellij.openapi.progress.ProgressIndicator;
 import com.intellij.openapi.progress.ProgressManager;
 import com.intellij.openapi.progress.Task;
+import com.intellij.openapi.project.IndexNotReadyException;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.ui.DialogWrapper;
 import com.intellij.openapi.ui.Messages;
@@ -134,6 +135,9 @@ public class FindUsagesManager implements JDOMExternalizable {
           return true;
         }
       }
+      catch (IndexNotReadyException e) {
+        throw e;
+      }
       catch (Exception e) {
         LOG.error(e);
       }
@@ -144,6 +148,9 @@ public class FindUsagesManager implements JDOMExternalizable {
           return true;
         }
       }
+      catch (IndexNotReadyException e) {
+        throw e;
+      }
       catch (Exception e) {
         LOG.error(e);
       }