diff --git a/.idea/dictionaries/kb.xml b/.idea/dictionaries/kb.xml
new file mode 100644
index 0000000..74bf831
--- /dev/null
+++ b/.idea/dictionaries/kb.xml
@@ -0,0 +1,3 @@
+<component name="ProjectDictionaryState">
+  <dictionary name="kb" />
+</component>
\ No newline at end of file
diff --git a/src/com/bulenkov/darcula/darcula_windows.properties b/src/com/bulenkov/darcula/darcula_windows.properties
index 3fea07b..8e38720 100644
--- a/src/com/bulenkov/darcula/darcula_windows.properties
+++ b/src/com/bulenkov/darcula/darcula_windows.properties
@@ -4,4 +4,6 @@ darcula.selectionForeground=bbbbbb
 
 PopupMenu.border=com.bulenkov.darcula.ui.DarculaPopupMenuBorder
 
-MenuBar.border=com.bulenkov.darcula.ui.DarculaMenuBarBorder
\ No newline at end of file
+MenuBar.border=com.bulenkov.darcula.ui.DarculaMenuBarBorder
+
+InternalFrameUI=com.bulenkov.darcula.ui.win.DarculaWindowsInternalFrameUI
\ No newline at end of file
diff --git a/src/com/bulenkov/darcula/ui/win/DarculaWindowsInternalFrameUI.java b/src/com/bulenkov/darcula/ui/win/DarculaWindowsInternalFrameUI.java
new file mode 100644
index 0000000..64887ba
--- /dev/null
+++ b/src/com/bulenkov/darcula/ui/win/DarculaWindowsInternalFrameUI.java
@@ -0,0 +1,22 @@
+package com.bulenkov.darcula.ui.win;
+
+import javax.swing.*;
+import javax.swing.plaf.ComponentUI;
+import javax.swing.plaf.basic.BasicInternalFrameUI;
+
+/**
+ * @author Konstantin Bulenkov
+ */
+public class DarculaWindowsInternalFrameUI extends BasicInternalFrameUI {
+  public DarculaWindowsInternalFrameUI(JInternalFrame b) {
+    super(b);
+  }
+
+
+  @SuppressWarnings({"MethodOverridesStaticMethodOfSuperclass", "UnusedDeclaration"})
+  public static ComponentUI createUI(JComponent c) {
+    return new DarculaWindowsInternalFrameUI(((JInternalFrame) c));
+  }
+
+
+}