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-rw-r--r--gtk/gtkadjustment.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/gtk/gtkadjustment.h b/gtk/gtkadjustment.h
index 1fe3e4ae8b..ea37a9a420 100644
--- a/gtk/gtkadjustment.h
+++ b/gtk/gtkadjustment.h
@@ -24,6 +24,10 @@
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
+#if defined(GTK_DISABLE_SINGLE_INCLUDES) && !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
+#error "Only <gtk/gtk.h> can be included directly."
+#endif
+
#ifndef __GTK_ADJUSTMENT_H__
#define __GTK_ADJUSTMENT_H__