diff --git a/include/haproxy/errors.h b/include/haproxy/errors.h
index c102fedb8..1fa501724 100644
--- a/include/haproxy/errors.h
+++ b/include/haproxy/errors.h
@@ -101,6 +101,8 @@ void ha_warning(const char *fmt, ...)
  * These functions are reserved to output diagnostics on MODE_DIAG.
  * Use the underscore variants only if MODE_DIAG has already been checked.
  */
+void ha_diag_notice(const char *fmt, ...)
+	__attribute__ ((format(printf, 1 ,2)));
 void _ha_vdiag_warning(const char *fmt, va_list argp);
 void _ha_diag_warning(const char *fmt, ...);
 void ha_diag_warning(const char *fmt, ...)
diff --git a/src/errors.c b/src/errors.c
index f71622c0a..9f334dbe4 100644
--- a/src/errors.c
+++ b/src/errors.c
@@ -386,6 +386,20 @@ void ha_diag_warning(const char *fmt, ...)
 	}
 }
 
+/*
+ * Displays the message on stderr with the pid if MODE_DIAG is set.
+ */
+void ha_diag_notice(const char *fmt, ...)
+{
+	va_list argp;
+
+	if (global.mode & MODE_DIAG) {
+		va_start(argp, fmt);
+		print_message(1, "DIAG", fmt, argp);
+		va_end(argp);
+	}
+}
+
 /*
  * Displays the message on stderr with the pid.
  */