diff --git a/platform/platform-impl/src/com/intellij/openapi/ui/impl/DialogWrapperPeerImpl.java b/platform/platform-impl/src/com/intellij/openapi/ui/impl/DialogWrapperPeerImpl.java
index 4d1415053e38..4eb07fab8e49 100644
--- a/platform/platform-impl/src/com/intellij/openapi/ui/impl/DialogWrapperPeerImpl.java
+++ b/platform/platform-impl/src/com/intellij/openapi/ui/impl/DialogWrapperPeerImpl.java
@@ -170,7 +170,7 @@ public class DialogWrapperPeerImpl extends DialogWrapperPeer implements FocusTra
    */
   protected DialogWrapperPeerImpl(@NotNull DialogWrapper wrapper, @NotNull Component parent, boolean canBeParent) {
     myWrapper = wrapper;
-    if (!parent.isShowing() && parent != JOptionPane.getRootFrame()) {
+    if (!parent.isShowing()) {
       throw new IllegalArgumentException("parent must be showing: " + parent);
     }
     myWindowManager = null;