--- Source/WebCore/GNUmakefile.list.am.orig	2011-10-15 01:27:23.000000000 -0400
+++ Source/WebCore/GNUmakefile.list.am	2012-04-20 13:58:55.000000000 -0400
@@ -3986,7 +3986,6 @@
 	Source/WebCore/platform/gtk/GtkUtilities.cpp \
 	Source/WebCore/platform/gtk/GtkUtilities.h \
 	Source/WebCore/platform/gtk/GtkWidgetBackingStoreCairo.cpp \
-	Source/WebCore/platform/gtk/GtkWidgetBackingStoreX11.cpp \
 	Source/WebCore/platform/gtk/GeolocationServiceGtk.cpp \
 	Source/WebCore/platform/gtk/GeolocationServiceGtk.h \
 	Source/WebCore/platform/gtk/GOwnPtrGtk.cpp \
@@ -4031,11 +4030,12 @@
 	Source/WebCore/platform/gtk/WidgetGtk.cpp \
 	Source/WebCore/platform/gtk/WidgetRenderingContext.cpp \
 	Source/WebCore/platform/gtk/WidgetRenderingContext.h \
-	Source/WebCore/plugins/gtk/PluginPackageGtk.cpp \
-	Source/WebCore/plugins/gtk/PluginViewGtk.cpp
+	Source/WebCore/plugins/gtk/PluginPackageGtk.cpp
 
 if TARGET_X11
 webcoregtk_sources += \
+	Source/WebCore/platform/gtk/GtkWidgetBackingStoreX11.cpp \
+	Source/WebCore/plugins/gtk/PluginViewGtk.cpp \
 	Source/WebCore/plugins/gtk/gtk2xtbin.c \
 	Source/WebCore/plugins/gtk/gtk2xtbin.h \
 	Source/WebCore/plugins/gtk/xembed.h
