diff --git a/src/ChangeLog b/src/ChangeLog
index 68ac883b..3cebf5be 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,7 @@
+2014-11-03  Tim Ruehsen  <tim.ruehsen@gmx.de>
+
+	* log.c: turn on automatic format check for log_vprintf_internal()
+
 2014-11-01  Darshit Shah  <darnir@gmail.com>
 
 	* progress.c (create_image): Extra padding for size_grouped_diff has already
diff --git a/src/log.c b/src/log.c
index 5334cb22..9fbbe4bc 100644
--- a/src/log.c
+++ b/src/log.c
@@ -385,7 +385,7 @@ struct logvprintf_state {
    (An alternative approach would be to use va_copy, but that's not
    portable.)  */
 
-static bool
+static bool GCC_FORMAT_ATTR (2, 0)
 log_vprintf_internal (struct logvprintf_state *state, const char *fmt,
                       va_list args)
 {