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-rw-r--r--include/util_filter.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/util_filter.h b/include/util_filter.h
index 5f6f9afab6..8b3c7a8487 100644
--- a/include/util_filter.h
+++ b/include/util_filter.h
@@ -332,8 +332,8 @@ AP_DECLARE(apr_status_t) ap_pass_brigade(ap_filter_t *filter,
AP_DECLARE(apr_status_t) ap_pass_brigade_fchk(request_rec *r,
apr_bucket_brigade *bucket,
const char *fmt,
- ...);
-
+ ...)
+ __attribute__((format(printf,3,4)));
/**
* This function is used to register an input filter with the system.