1 files changed, 3 insertions, 0 deletions

diff --git a/trace-compat.h b/trace-compat.h
index 2eed192..fa11a35 100644
--- a/trace-compat.h
+++ b/trace-compat.h
@@ -22,6 +22,7 @@
 #define _TRACE_COMPAT_H
 
 #include <gtk/gtk.h>
+#include <stdarg.h>
 
 #define CALC_GTK_VERSION(maj, min, ext) ((maj << 16) + (min << 8) + ext)
 
@@ -46,6 +47,8 @@ gdouble gtk_adjustment_get_lower(GtkAdjustment *adj);
 gboolean gtk_show_uri(GdkScreen *screen, const gchar *uri,
                       guint32 timestamp, GError **error);
 
+void g_string_vprintf(GString *string, const gchar *format, va_list args);
+
 #endif /* version < 2.14.0 */
 
 #if GTK_VERSION < CALC_GTK_VERSION(2,12,0)