diff --git a/doc/input-filter-h.sh b/doc/input-filter-h.sh
index 554837c8c..10b53eb98 100755
--- a/doc/input-filter-h.sh
+++ b/doc/input-filter-h.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # Doxygen input filter, which tries to fix documentation of callback
 # method macros.