diff --git a/build-aux/ci_build.sh b/build-aux/ci_build.sh
index 3b462e63..0a9dc09b 100755
--- a/build-aux/ci_build.sh
+++ b/build-aux/ci_build.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 #
 #############################################################################
 #