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-rw-r--r--libmate-panel-applet/panel-plug-private.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/libmate-panel-applet/panel-plug-private.h b/libmate-panel-applet/panel-plug-private.h
index 0f5933f0..82e0ac05 100644
--- a/libmate-panel-applet/panel-plug-private.h
+++ b/libmate-panel-applet/panel-plug-private.h
@@ -20,6 +20,12 @@
#ifndef PANEL_PLUG_PRIVATE_H
#define PANEL_PLUG_PRIVATE_H
+#ifdef PACKAGE_NAME // only check HAVE_X11 if config.h has been included
+#ifndef HAVE_X11
+#error file should only be included when HAVE_X11 is enabled
+#endif
+#endif
+
#include <gtk/gtk.h>
#include <gtk/gtkx.h>