diff --git a/src/aui/dockart.cpp b/src/aui/dockart.cpp
index 563154c89e..933390a24d 100644
--- a/src/aui/dockart.cpp
+++ b/src/aui/dockart.cpp
@@ -162,11 +162,16 @@ wxDefaultDockArt::wxDefaultDockArt()
 #endif
 
     // some built in bitmaps
-#ifdef __WXMAC__
+#if defined( __WXMAC__ )
      static unsigned char close_bits[]={
          0xFF, 0xFF, 0xFF, 0xFF, 0x0F, 0xFE, 0x03, 0xF8, 0x01, 0xF0, 0x19, 0xF3,
          0xB8, 0xE3, 0xF0, 0xE1, 0xE0, 0xE0, 0xF0, 0xE1, 0xB8, 0xE3, 0x19, 0xF3,
          0x01, 0xF0, 0x03, 0xF8, 0x0F, 0xFE, 0xFF, 0xFF };
+#elif defined( __WXGTK__)
+    static unsigned char close_bits[]={
+         0xff, 0xff, 0xff, 0xff, 0x07, 0xf0, 0xfb, 0xef, 0xdb, 0xed, 0x8b, 0xe8,
+         0x1b, 0xec, 0x3b, 0xee, 0x1b, 0xec, 0x8b, 0xe8, 0xdb, 0xed, 0xfb, 0xef,
+         0x07, 0xf0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 #else
     static unsigned char close_bits[]={
         0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xef,0xfb,0xcf,0xf9,