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-rw-r--r--facebook/facebook-util.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/facebook/facebook-util.h b/facebook/facebook-util.h
index 9bfb04f..fdf4434 100644
--- a/facebook/facebook-util.h
+++ b/facebook/facebook-util.h
@@ -46,7 +46,8 @@ gboolean fb_util_debugging(void);
#ifdef DEBUG_FACEBOOK
void fb_util_hexdump(const GByteArray *bytes, guint indent,
- const gchar *fmt, ...);
+ const gchar *fmt, ...)
+ G_GNUC_PRINTF(3, 4);
#else /* DEBUG_FACEBOOK */
#define fb_util_hexdump(bs, i, f, ...)
#endif /* DEBUG_FACEBOOK */