diff --git a/include/haproxy/trace.h b/include/haproxy/trace.h
index 2c823e460..2ddc8d587 100644
--- a/include/haproxy/trace.h
+++ b/include/haproxy/trace.h
@@ -149,6 +149,10 @@ void __trace(enum trace_level level, uint64_t mask, struct trace_source *src,
                         const void *a1, const void *a2, const void *a3, const void *a4),
              const struct ist msg);
 
+void trace_no_cb(enum trace_level level, uint64_t mask, const struct trace_source *src,
+		 const struct ist where, const struct ist func,
+		 const void *a1, const void *a2, const void *a3, const void *a4);
+
 void trace_register_source(struct trace_source *source);
 
 /* return a single char to describe a trace state */
diff --git a/src/trace.c b/src/trace.c
index 6aa155d44..32fac61d3 100644
--- a/src/trace.c
+++ b/src/trace.c
@@ -298,6 +298,14 @@ void __trace(enum trace_level level, uint64_t mask, struct trace_source *src,
 	}
 }
 
+/* this callback may be used when no output modification is desired */
+void trace_no_cb(enum trace_level level, uint64_t mask, const struct trace_source *src,
+		 const struct ist where, const struct ist func,
+		 const void *a1, const void *a2, const void *a3, const void *a4)
+{
+	/* do nothing */
+}
+
 /* registers trace source <source>. Modifies the list element!
  * The {start,pause,stop,report} events are not changed so the source may
  * preset them.