diff --git a/doc/Makefile b/doc/Makefile
index db378be67..a67148798 100644
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -1,6 +1,6 @@
 # $Id$
 
-SHELL = /bin/bash
+SHELL = /bin/sh
 
 CONTRIBUTED_MODULES = ""
 #ifeq ($(shell ls mod_http_bind.tex),mod_http_bind.tex)